Jquery Validation


STEP:1 jquery.validationEngine.js

/*
* Inline Form Validation Engine 2.1, jQuery plugin
*
* Copyright(c) 2010, Cedric Dugas
* http://www.position-absolute.com
*
* 2.0 Rewrite by Olivier Refalo
* http://www.crionics.com
*
* Form validation engine allowing custom regex rules to be added.
* Licensed under the MIT License
*/
(function($) {

var methods = {

/**
* Kind of the constructor, called before any action
* @param {Map} user options
*/
init: function(options) {
var form = this;
if (!form.data(‘jqv’) || form.data(‘jqv’) == null ) {
methods._saveOptions(form, options);

// bind all formError elements to close on click
$(“.formError”).live(“click”, function() {
$(this).fadeOut(150, function() {

// remove prompt once invisible
$(this).remove();
});
});
}
},
/**
* Attachs jQuery.validationEngine to form.submit and field.blur events
* Takes an optional params: a list of options
* ie. jQuery(“#formID1”).validationEngine(‘attach’, {promptPosition : “centerRight”});
*/
attach: function(userOptions) {
var form = this;
var options;

if(userOptions)
options = methods._saveOptions(form, userOptions);
else
options = form.data(‘jqv’);

if (!options.binded) {
if (options.bindMethod == “bind”){
// bind fields
form.find(“[class*=validate]:not([type=checkbox])”).bind(options.validationEventTrigger, methods._onFieldEvent);
form.find(“[class*=validate][type=checkbox]”).bind(“click”, methods._onFieldEvent);

// bind form.submit
form.bind(“submit”, methods._onSubmitEvent);
} else if (options.bindMethod == “live”) {
// bind fields with LIVE (for persistant state)
form.find(“[class*=validate]:not([type=checkbox])”).live(options.validationEventTrigger, methods._onFieldEvent);
form.find(“[class*=validate][type=checkbox]”).live(“click”, methods._onFieldEvent);

// bind form.submit
form.live(“submit”, methods._onSubmitEvent);
}

options.binded = true;
}

},
/**
* Unregisters any bindings that may point to jQuery.validaitonEngine
*/
detach: function() {
var form = this;
var options = form.data(‘jqv’);
if (options.binded) {

// unbind fields
form.find(“[class*=validate]”).not(“[type=checkbox]”).unbind(options.validationEventTrigger, methods._onFieldEvent);
form.find(“[class*=validate][type=checkbox]”).unbind(“click”, methods._onFieldEvent);
// unbind form.submit
form.unbind(“submit”, methods.onAjaxFormComplete);

// unbind live fields (kill)
form.find(“[class*=validate]”).not(“[type=checkbox]”).die(options.validationEventTrigger, methods._onFieldEvent);
form.find(“[class*=validate][type=checkbox]”).die(“click”, methods._onFieldEvent);
// unbind form.submit
form.die(“submit”, methods.onAjaxFormComplete);

form.removeData(‘jqv’);
}
},
/**
* Validates the form fields, shows prompts accordingly.
* Note: There is no ajax form validation with this method, only field ajax validation are evaluated
*
* @return true if the form validates, false if it fails
*/
validate: function() {
return methods._validateFields(this);
},
/**
* Validates one field, shows prompt accordingly.
* Note: There is no ajax form validation with this method, only field ajax validation are evaluated
*
* @return true if the form validates, false if it fails
*/
validateField: function(el) {
var options = $(this).data(‘jqv’);
return methods._validateField($(el), options);
},
/**
* Validates the form fields, shows prompts accordingly.
* Note: this methods performs fields and form ajax validations(if setup)
*
* @return true if the form validates, false if it fails, undefined if ajax is used for form validation
*/
validateform: function() {
return methods._onSubmitEvent.call(this);
},
/**
* Displays a prompt on a element.
* Note that the element needs an id!
*
* @param {String} promptText html text to display type
* @param {String} type the type of bubble: ‘pass’ (green), ‘load’ (black) anything else (red)
* @param {String} possible values topLeft, topRight, bottomLeft, centerRight, bottomRight
*/
showPrompt: function(promptText, type, promptPosition, showArrow) {

var form = this.closest(‘form’);
var options = form.data(‘jqv’);
// No option, take default one
if(!options) options = methods._saveOptions(this, options);
if(promptPosition)
options.promptPosition=promptPosition;
options.showArrow = showArrow==true;

methods._showPrompt(this, promptText, type, false, options);
},
/**
* Closes all error prompts on the page
*/
hidePrompt: function() {
var promptClass =  “.”+ methods._getClassName($(this).attr(“id”)) + “formError”
$(promptClass).fadeTo(“fast”, 0.3, function() {
$(this).remove();
});
},
/**
* Closes form error prompts, CAN be invidual
*/
hide: function() {
if($(this).is(“form”)){
var closingtag = “parentForm”+$(this).attr(‘id’);
}else{

var closingtag = $(this).attr(‘id’) +”formError”
}
$(‘.’+closingtag).fadeTo(“fast”, 0.3, function() {
$(this).remove();
});
},
/**
* Closes all error prompts on the page
*/
hideAll: function() {
$(‘.formError’).fadeTo(“fast”, 0.3, function() {
$(this).remove();
});
},
/**
* Typically called when user exists a field using tab or a mouse click, triggers a field
* validation
*/
_onFieldEvent: function() {
var field = $(this);
var form = field.closest(‘form’);
var options = form.data(‘jqv’);
// validate the current field
methods._validateField(field, options);
},
/**
* Called when the form is submited, shows prompts accordingly
*
* @param {jqObject}
*            form
* @return false if form submission needs to be cancelled
*/
_onSubmitEvent: function() {
var form = $(this);
var options = form.data(‘jqv’);

// validate each field (- skip field ajax validation, no necessary since we will perform an ajax form validation)
var r=methods._validateFields(form, true);

if (r && options.ajaxFormValidation) {
methods._validateFormWithAjax(form, options);
return false;
}

if(options.onValidationComplete) {
options.onValidationComplete(form, r);
return false;
}
return r;
},

/**
* Return true if the ajax field validations passed so far
* @param {Object} options
* @return true, is all ajax validation passed so far (remember ajax is async)
*/
_checkAjaxStatus: function(options) {
var status = true;
$.each(options.ajaxValidCache, function(key, value) {
if (!value) {
status = false;
// break the each
return false;
}
});
return status;
},
/**
* Validates form fields, shows prompts accordingly
*
* @param {jqObject}
*            form
* @param {skipAjaxFieldValidation}
*            boolean – when set to true, ajax field validation is skipped, typically used when the submit button is clicked
*
* @return true if form is valid, false if not, undefined if ajax form validation is done
*/
_validateFields: function(form, skipAjaxValidation) {
var options = form.data(‘jqv’);

// this variable is set to true if an error is found
var errorFound = false;

// Trigger hook, start validation
form.trigger(“jqv.form.validating”)
// first, evaluate status of non ajax fields
form.find(‘[class*=validate]’).not(‘:hidden’).each( function() {
var field = $(this);
errorFound |= methods._validateField(field, options, skipAjaxValidation);
});
// second, check to see if all ajax calls completed ok
// errorFound |= !methods._checkAjaxStatus(options);

// thrird, check status and scroll the container accordingly
form.trigger(“jqv.form.result”, [errorFound])

if (errorFound) {

if (options.scroll) {

// get the position of the first error, there should be at least one, no need to check this
//var destination = form.find(“.formError:not(‘.greenPopup’):first”).offset().top;

// look for the visually top prompt
var destination = Number.MAX_VALUE;

var lst = $(“.formError:not(‘.greenPopup’)”);
for (var i = 0; i < lst.length; i++) {
var d = $(lst[i]).offset().top;
if (d < destination)
destination = d;
}

if (!options.isOverflown)
$(“html:not(:animated),body:not(:animated)”).animate({
scrollTop: destination
}, 1100);
else {
var overflowDIV = $(options.overflownDIV);
var scrollContainerScroll = overflowDIV.scrollTop();
var scrollContainerPos = -parseInt(overflowDIV.offset().top);

destination += scrollContainerScroll + scrollContainerPos – 5;
var scrollContainer = $(options.overflownDIV + “:not(:animated)”);

scrollContainer.animate({
scrollTop: destination
}, 1100);
}
}
return false;
}
return true;
},
/**
* This method is called to perform an ajax form validation.
* During this process all the (field, value) pairs are sent to the server which returns a list of invalid fields or true
*
* @param {jqObject} form
* @param {Map} options
*/
_validateFormWithAjax: function(form, options) {

var data = form.serialize();
var url = (options.ajaxFormValidationURL) ? options.ajaxFormValidationURL : form.attr(“action”);
$.ajax({
type: “GET”,
url: url,
cache: false,
dataType: “json”,
data: data,
form: form,
methods: methods,
options: options,
beforeSend: function() {
return options.onBeforeAjaxFormValidation(form, options);
},
error: function(data, transport) {
methods._ajaxError(data, transport);
},
success: function(json) {

if (json !== true) {

// getting to this case doesn’t necessary means that the form is invalid
// the server may return green or closing prompt actions
// this flag helps figuring it out
var errorInForm=false;
for (var i = 0; i < json.length; i++) {
var value = json[i];

var errorFieldId = value[0];
var errorField = $($(“#” + errorFieldId)[0]);

// make sure we found the element
if (errorField.length == 1) {

// promptText or selector
var msg = value[2];
// if the field is valid
if (value[1] == true) {

if (msg == “”  || !msg){
// if for some reason, status==true and error=””, just close the prompt
methods._closePrompt(errorField);
} else {
// the field is valid, but we are displaying a green prompt
if (options.allrules[msg]) {
var txt = options.allrules[msg].alertTextOk;
if (txt)
msg = txt;
}
methods._showPrompt(errorField, msg, “pass”, false, options, true);
}

} else {
// the field is invalid, show the red error prompt
errorInForm|=true;
if (options.allrules[msg]) {
var txt = options.allrules[msg].alertText;
if (txt)
msg = txt;
}
methods._showPrompt(errorField, msg, “”, false, options, true);
}
}
}
options.onAjaxFormComplete(!errorInForm, form, json, options);
} else
options.onAjaxFormComplete(true, form, “”, options);
}
});

},
/**
* Validates field, shows prompts accordingly
*
* @param {jqObject}
*            field
* @param {Array[String]}
*            field’s validation rules
* @param {Map}
*            user options
* @return true if field is valid
*/
_validateField: function(field, options, skipAjaxValidation) {
if (!field.attr(“id”))
$.error(“jQueryValidate: an ID attribute is required for this field: ” + field.attr(“name”) + ” class:” +
field.attr(“class”));

var rulesParsing = field.attr(‘class’);
var getRules = /validate\[(.*)\]/.exec(rulesParsing);
if (!getRules)
return false;
var str = getRules[1];
var rules = str.split(/\[|,|\]/);

// true if we ran the ajax validation, tells the logic to stop messing with prompts
var isAjaxValidator = false;
var fieldName = field.attr(“name”);
var promptText = “”;
var required = false;
options.isError = false;
options.showArrow = true;
optional = false;

for (var i = 0; i < rules.length; i++) {

var errorMsg = undefined;
switch (rules[i]) {

case “optional”:
optional = true;
break;
case “required”:
required = true;
errorMsg = methods._required(field, rules, i, options);
break;
case “custom”:
errorMsg = methods._customRegex(field, rules, i, options);
break;
case “ajax”:
// ajax has its own prompts handling technique
if(!skipAjaxValidation){
methods._ajax(field, rules, i, options);
isAjaxValidator = true;
}
break;
case “minSize”:
errorMsg = methods._minSize(field, rules, i, options);
break;
case “maxSize”:
errorMsg = methods._maxSize(field, rules, i, options);
break;
case “min”:
errorMsg = methods._min(field, rules, i, options);
break;
case “max”:
errorMsg = methods._max(field, rules, i, options);
break;
case “past”:
errorMsg = methods._past(field, rules, i, options);
break;
case “future”:
errorMsg = methods._future(field, rules, i, options);
break;
case “maxCheckbox”:
errorMsg = methods._maxCheckbox(field, rules, i, options);
field = $($(“input[name='” + fieldName + “‘]”));
break;
case “minCheckbox”:
errorMsg = methods._minCheckbox(field, rules, i, options);
field = $($(“input[name='” + fieldName + “‘]”));
break;
case “equals”:
errorMsg = methods._equals(field, rules, i, options);
break;
case “funcCall”:
errorMsg = methods._funcCall(field, rules, i, options);
break;

default:
//$.error(“jQueryValidator rule not found”+rules[i]);
}
if (errorMsg !== undefined) {
promptText += errorMsg + “<br/>”;
options.isError = true;

}

}
// If the rules required is not added, an empty field is not validated
if(!required){
if(field.val() == “”) options.isError = false;
}
// Hack for radio/checkbox group button, the validation go into the
// first radio/checkbox of the group
var fieldType = field.attr(“type”);

if ((fieldType == “radio” || fieldType == “checkbox”) && $(“input[name='” + fieldName + “‘]”).size() > 1) {
field = $($(“input[name='” + fieldName + “‘][type!=hidden]:first”));
options.showArrow = false;
}

if (options.isError){

methods._showPrompt(field, promptText, “”, false, options);
}else{
if (!isAjaxValidator) methods._closePrompt(field);
}
field.closest(‘form’).trigger(“jqv.field.error”, [field, options.isError, promptText])
return options.isError;
},
/**
* Required validation
*
* @param {jqObject} field
* @param {Array[String]} rules
* @param {int} i rules index
* @param {Map}
*            user options
* @return an error string if validation failed
*/
_required: function(field, rules, i, options) {
switch (field.attr(“type”)) {
case “text”:
case “password”:
case “textarea”:
case “file”:
default:
if (!field.val())
return options.allrules[rules[i]].alertText;
break;
case “radio”:
case “checkbox”:
var name = field.attr(“name”);
if ($(“input[name='” + name + “‘]:checked”).size() == 0) {

if ($(“input[name='” + name + “‘]”).size() == 1)
return options.allrules[rules[i]].alertTextCheckboxe;
else
return options.allrules[rules[i]].alertTextCheckboxMultiple;
}
break;
// required for <select>
case “select-one”:
// added by paul@kinetek.net for select boxes, Thank you
if (!field.val())
return options.allrules[rules[i]].alertText;
break;
case “select-multiple”:
// added by paul@kinetek.net for select boxes, Thank you
if (!field.find(“option:selected”).val())
return options.allrules[rules[i]].alertText;
break;
}
},
/**
* Validate Regex rules
*
* @param {jqObject} field
* @param {Array[String]} rules
* @param {int} i rules index
* @param {Map}
*            user options
* @return an error string if validation failed
*/
_customRegex: function(field, rules, i, options) {
var customRule = rules[i + 1];
var rule = options.allrules[customRule];
if(!rule) {
alert(“jqv:custom rule not found “+customRule);
return;
}

var ex=rule.regex;
if(!ex) {
alert(“jqv:custom regex not found “+customRule);
return;
}
var pattern = new RegExp(ex);

if (!pattern.test(field.attr(‘value’)))
return options.allrules[customRule].alertText;
},
/**
* Validate custom function outside of the engine scope
*
* @param {jqObject} field
* @param {Array[String]} rules
* @param {int} i rules index
* @param {Map}
*            user options
* @return an error string if validation failed
*/
_funcCall: function(field, rules, i, options) {
var functionName = rules[i + 1];
var fn = window[functionName];
if (typeof(fn) == ‘function’)
return fn(field, rules, i, options);

},
/**
* Field match
*
* @param {jqObject} field
* @param {Array[String]} rules
* @param {int} i rules index
* @param {Map}
*            user options
* @return an error string if validation failed
*/
_equals: function(field, rules, i, options) {
var equalsField = rules[i + 1];

if (field.attr(‘value’) != $(“#” + equalsField).attr(‘value’))
return options.allrules.equals.alertText;
},
/**
* Check the maximum size (in characters)
*
* @param {jqObject} field
* @param {Array[String]} rules
* @param {int} i rules index
* @param {Map}
*            user options
* @return an error string if validation failed
*/
_maxSize: function(field, rules, i, options) {
var max = rules[i + 1];
var len = field.attr(‘value’).length;

if (len > max) {
var rule = options.allrules.maxSize;
return rule.alertText + max + rule.alertText2;
}
},
/**
* Check the minimum size (in characters)
*
* @param {jqObject} field
* @param {Array[String]} rules
* @param {int} i rules index
* @param {Map}
*            user options
* @return an error string if validation failed
*/
_minSize: function(field, rules, i, options) {
var min = rules[i + 1];
var len = field.attr(‘value’).length;

if (len < min) {
var rule = options.allrules.minSize;
return rule.alertText + min + rule.alertText2;
}
},
/**
* Check number minimum value
*
* @param {jqObject} field
* @param {Array[String]} rules
* @param {int} i rules index
* @param {Map}
*            user options
* @return an error string if validation failed
*/
_min: function(field, rules, i, options) {
var min = parseFloat(rules[i + 1]);
var len = parseFloat(field.attr(‘value’));

if (len < min) {
var rule = options.allrules.min;
if (rule.alertText2) return rule.alertText + min + rule.alertText2;
return rule.alertText + min;
}
},
/**
* Check number maximum value
*
* @param {jqObject} field
* @param {Array[String]} rules
* @param {int} i rules index
* @param {Map}
*            user options
* @return an error string if validation failed
*/
_max: function(field, rules, i, options) {
var max = parseFloat(rules[i + 1]);
var len = parseFloat(field.attr(‘value’));

if (len >max ) {
var rule = options.allrules.max;
if (rule.alertText2) return rule.alertText + max + rule.alertText2;
//orefalo: to review, also do the translations
return rule.alertText + max;
}
},
/**
* Checks date is in the past
*
* @param {jqObject} field
* @param {Array[String]} rules
* @param {int} i rules index
* @param {Map}
*            user options
* @return an error string if validation failed
*/
_past: function(field, rules, i, options) {

var p=rules[i + 1];
var pdate = (p.toLowerCase() == “now”)? new Date():methods._parseDate(p);
var vdate = methods._parseDate(field.attr(‘value’));

if (vdate > pdate ) {
var rule = options.allrules.past;
if (rule.alertText2) return rule.alertText + methods._dateToString(pdate) + rule.alertText2;
return rule.alertText + methods._dateToString(pdate);
}
},
/**
* Checks date is in the past
*
* @param {jqObject} field
* @param {Array[String]} rules
* @param {int} i rules index
* @param {Map}
*            user options
* @return an error string if validation failed
*/
_future: function(field, rules, i, options) {

var p=rules[i + 1];
var pdate = (p.toLowerCase() == “now”)? new Date():methods._parseDate(p);
var vdate = methods._parseDate(field.attr(‘value’));

if (vdate < pdate ) {
var rule = options.allrules.future;
if (rule.alertText2) return rule.alertText + methods._dateToString(pdate) + rule.alertText2;
return rule.alertText + methods._dateToString(pdate);
}
},
/**
* Max number of checkbox selected
*
* @param {jqObject} field
* @param {Array[String]} rules
* @param {int} i rules index
* @param {Map}
*            user options
* @return an error string if validation failed
*/
_maxCheckbox: function(field, rules, i, options) {

var nbCheck = rules[i + 1];
var groupname = field.attr(“name”);
var groupSize = $(“input[name='” + groupname + “‘]:checked”).size();
if (groupSize > nbCheck) {
options.showArrow = false;
return options.allrules.maxCheckbox.alertText;
}
},
/**
* Min number of checkbox selected
*
* @param {jqObject} field
* @param {Array[String]} rules
* @param {int} i rules index
* @param {Map}
*            user options
* @return an error string if validation failed
*/
_minCheckbox: function(field, rules, i, options) {

var nbCheck = rules[i + 1];
var groupname = field.attr(“name”);
var groupSize = $(“input[name='” + groupname + “‘]:checked”).size();
if (groupSize < nbCheck) {
options.showArrow = false;
return options.allrules.minCheckbox.alertText + ” ” + nbCheck + ” ” +
options.allrules.minCheckbox.alertText2;
}
},
/**
* Ajax field validation
*
* @param {jqObject} field
* @param {Array[String]} rules
* @param {int} i rules index
* @param {Map}
*            user options
* @return nothing! the ajax validator handles the prompts itself
*/
_ajax: function(field, rules, i, options) {

var errorSelector = rules[i + 1];
var rule = options.allrules[errorSelector];
var extraData = rule.extraData;

if (!extraData)
extraData = “”;

if (!options.isError) {
$.ajax({
type: “GET”,
url: rule.url,
cache: false,
dataType: “json”,
data: “fieldId=” + field.attr(“id”) + “&fieldValue=” + field.attr(“value”) + “&extraData=” + extraData,
field: field,
rule: rule,
methods: methods,
options: options,
beforeSend: function() {
// build the loading prompt
var loadingText = rule.alertTextLoad;
if (loadingText)
methods._showPrompt(field, loadingText, “load”, true, options);
},
error: function(data, transport) {
methods._ajaxError(data, transport);
},
success: function(json) {

// asynchronously called on success, data is the json answer from the server
var errorFieldId = json[0];
var errorField = $($(“#” + errorFieldId)[0]);
// make sure we found the element
if (errorField.length == 1) {
var status = json[1];
if (!status) {
// Houston we got a problem
options.ajaxValidCache[errorFieldId] = false;
options.isError = true;
var promptText = rule.alertText;
methods._showPrompt(errorField, promptText, “”, true, options);
} else {
if (options.ajaxValidCache[errorFieldId] !== undefined)
options.ajaxValidCache[errorFieldId] = true;

// see if we should display a green prompt
var alertTextOk = rule.alertTextOk;
if (alertTextOk)
methods._showPrompt(errorField, alertTextOk, “pass”, true, options);
else
methods._closePrompt(errorField);
}
}
}
});
}
},
/**
* Common method to handle ajax errors
*
* @param {Object} data
* @param {Object} transport
*/
_ajaxError: function(data, transport) {
if(data.status == 0 && transport == null)
alert(“The page is not served from a server! ajax call failed”);
else if(typeof console != “undefined”)
console.log(“Ajax error: ” + data.status + ” ” + transport);
},
/**
* date -> string
*
* @param {Object} date
*/
_dateToString: function(date) {

return date.getFullYear()+”-“+(date.getMonth()+1)+”-“+date.getDate();
},
/**
* Parses an ISO date
* @param {String} d
*/
_parseDate: function(d) {

var dateParts = d.split(“-“);
if(dateParts!==d)
dateParts = d.split(“/”);
return new Date(dateParts[0], (dateParts[1] – 1) ,dateParts[2]);
},
/**
* Builds or updates a prompt with the given information
*
* @param {jqObject} field
* @param {String} promptText html text to display type
* @param {String} type the type of bubble: ‘pass’ (green), ‘load’ (black) anything else (red)
* @param {boolean} ajaxed – use to mark fields than being validated with ajax
* @param {Map} options user options
*/
_showPrompt: function(field, promptText, type, ajaxed, options, ajaxform) {
var prompt = methods._getPrompt(field);
// The ajax submit errors are not see has an error in the form,
// When the form errors are returned, the engine see 2 bubbles, but those are ebing closed by the engine at the same time
// Because no error was found befor submitting
if(ajaxform) prompt = false;
if (prompt)
methods._updatePrompt(field, prompt, promptText, type, ajaxed, options);
else
methods._buildPrompt(field, promptText, type, ajaxed, options);
},
/**
* Builds and shades a prompt for the given field.
*
* @param {jqObject} field
* @param {String} promptText html text to display type
* @param {String} type the type of bubble: ‘pass’ (green), ‘load’ (black) anything else (red)
* @param {boolean} ajaxed – use to mark fields than being validated with ajax
* @param {Map} options user options
*/
_buildPrompt: function(field, promptText, type, ajaxed, options) {

// create the prompt
var prompt = $(‘<div>’);
prompt.addClass(methods._getClassName(field.attr(“id”)) + “formError”);
// add a class name to identify the parent form of the prompt
if(field.is(“:input”)) prompt.addClass(“parentForm”+methods._getClassName(field.parents(‘form’).attr(“id”)));
prompt.addClass(“formError”);

switch (type) {
case “pass”:
prompt.addClass(“greenPopup”);
break;
case “load”:
prompt.addClass(“blackPopup”);
}
if (ajaxed)
prompt.addClass(“ajaxed”);

// create the prompt content
var promptContent = $(‘<div>’).addClass(“formErrorContent”).html(promptText).appendTo(prompt);
// create the css arrow pointing at the field
// note that there is no triangle on max-checkbox and radio
if (options.showArrow) {
var arrow = $(‘<div>’).addClass(“formErrorArrow”);

switch (options.promptPosition) {
case “bottomLeft”:
case “bottomRight”:
prompt.find(“.formErrorContent”).before(arrow);
arrow.addClass(“formErrorArrowBottom”).html(‘<div><!– –></div><div><!– –></div><div><!– –></div><div><!– –></div><div><!– –></div><div><!– –></div><div><!– –></div><div><!– –></div><div><!– –></div><div><!– –></div>’);
break;
case “topLeft”:
case “topRight”:
arrow.html(‘<div><!– –></div><div><!– –></div><div><!– –></div><div><!– –></div><div><!– –></div><div><!– –></div><div><!– –></div><div><!– –></div><div><!– –></div><div><!– –></div>’);
prompt.append(arrow);
break;
}
}

//Cedric: Needed if a container is in position:relative
// insert prompt in the form or in the overflown container?
if (options.isOverflown)
field.before(prompt);
else
$(“body”).append(prompt);

var pos = methods._calculatePosition(field, prompt, options);
prompt.css({
“top”: pos.callerTopPosition,
“left”: pos.callerleftPosition,
“marginTop”: pos.marginTopSize,
“opacity”: 0
});

return prompt.animate({
“opacity”: 0.87
});

},
/**
* Updates the prompt text field – the field for which the prompt
* @param {jqObject} field
* @param {String} promptText html text to display type
* @param {String} type the type of bubble: ‘pass’ (green), ‘load’ (black) anything else (red)
* @param {boolean} ajaxed – use to mark fields than being validated with ajax
* @param {Map} options user options
*/
_updatePrompt: function(field, prompt, promptText, type, ajaxed, options) {

if (prompt) {
if (type == “pass”)
prompt.addClass(“greenPopup”);
else
prompt.removeClass(“greenPopup”);

if (type == “load”)
prompt.addClass(“blackPopup”);
else
prompt.removeClass(“blackPopup”);

if (ajaxed)
prompt.addClass(“ajaxed”);
else
prompt.removeClass(“ajaxed”);

prompt.find(“.formErrorContent”).html(promptText);

var pos = methods._calculatePosition(field, prompt, options);
prompt.animate({
“top”: pos.callerTopPosition,
“marginTop”: pos.marginTopSize
});
}
},
/**
* Closes the prompt associated with the given field
*
* @param {jqObject}
*            field
*/
_closePrompt: function(field) {

var prompt = methods._getPrompt(field);
if (prompt)
prompt.fadeTo(“fast”, 0, function() {
prompt.remove();
});
},
closePrompt: function(field) {
return methods._closePrompt(field);
},
/**
* Returns the error prompt matching the field if any
*
* @param {jqObject}
*            field
* @return undefined or the error prompt (jqObject)
*/
_getPrompt: function(field) {

var className = “.” + methods._getClassName(field.attr(“id”)) + “formError”;
var match = $(className)[0];
if (match)
return $(match);
},
/**
* Calculates prompt position
*
* @param {jqObject}
*            field
* @param {jqObject}
*            the prompt
* @param {Map}
*            options
* @return positions
*/
_calculatePosition: function(field, promptElmt, options) {

var promptTopPosition, promptleftPosition, marginTopSize;
var fieldWidth = field.width();
var promptHeight = promptElmt.height();

var overflow = options.isOverflown;
if (overflow) {
// is the form contained in an overflown container?
promptTopPosition = promptleftPosition = 0;
// compensation for the arrow
marginTopSize = -promptHeight;
} else {
var offset = field.offset();
promptTopPosition = offset.top;
promptleftPosition = offset.left;
marginTopSize = 0;
}

switch (options.promptPosition) {

default:
case “topRight”:
if (overflow)
// Is the form contained in an overflown container?
promptleftPosition += fieldWidth – 30;
else {
promptleftPosition += fieldWidth – 30;
promptTopPosition += -promptHeight;
}
break;
case “topLeft”:
promptTopPosition += -promptHeight – 10;
break;
case “centerRight”:
promptleftPosition += fieldWidth + 13;
break;
case “bottomLeft”:
promptTopPosition = promptTopPosition + field.height() + 15;
break;
case “bottomRight”:
promptleftPosition += fieldWidth – 30;
promptTopPosition += field.height() + 5;
}

return {
“callerTopPosition”: promptTopPosition + “px”,
“callerleftPosition”: promptleftPosition + “px”,
“marginTopSize”: marginTopSize + “px”
};
},
/**
* Saves the user options and variables in the form.data
*
* @param {jqObject}
*            form – the form where the user option should be saved
* @param {Map}
*            options – the user options
* @return the user options (extended from the defaults)
*/
_saveOptions: function(form, options) {

// is there a language localisation ?
if ($.validationEngineLanguage)
var allRules = $.validationEngineLanguage.allRules;
else
$.error(“jQuery.validationEngine rules are not loaded, plz add localization files to the page”);

var userOptions = $.extend({

// Name of the event triggering field validation
validationEventTrigger: “blur”,
// Automatically scroll viewport to the first error
scroll: true,
// Opening box position, possible locations are: topLeft,
// topRight, bottomLeft, centerRight, bottomRight
promptPosition: “topRight”,
bindMethod:”bind”,
// internal, automatically set to true when it parse a _ajax rule
inlineAjax: false,
// if set to true, the form data is sent asynchronously via ajax to the form.action url (get)
ajaxFormValidation: false,
// Ajax form validation callback method: boolean onComplete(form, status, errors, options)
// retuns false if the form.submit event needs to be canceled.
ajaxFormValidationURL: false,
// The url to send the submit ajax validation (default to action)
onAjaxFormComplete: $.noop,
// called right before the ajax call, may return false to cancel
onBeforeAjaxFormValidation: $.noop,
// Stops form from submitting and execute function assiciated with it
onValidationComplete: false,

// Used when the form is displayed within a scrolling DIV
isOverflown: false,
overflownDIV: “”,

// — Internals DO NOT TOUCH or OVERLOAD —
// validation rules and i18
allrules: allRules,
// true when form and fields are binded
binded: false,
// set to true, when the prompt arrow needs to be displayed
showArrow: true,
// did one of the validation fail ? kept global to stop further ajax validations
isError: false,
// Caches field validation status, typically only bad status are created.
// the array is used during ajax form validation to detect issues early and prevent an expensive submit
ajaxValidCache: {}

}, options);

form.data(‘jqv’, userOptions);
return userOptions;
},

/**
* Removes forbidden characters from class name
* @param {String} className
*/
_getClassName: function(className) {
return className.replace(“:”,”_”).replace(“.”,”_”);
}
};

/**
* Plugin entry point.
* You may pass an action as a parameter or a list of options.
* if none, the init and attach methods are being called.
* Remember: if you pass options, the attached method is NOT called automatically
*
* @param {String}
*            method (optional) action
*/
$.fn.validationEngine = function(method) {

var form = $(this);
if(!form[0]) return false;  // stop here if the form does not exist

if (typeof(method) == ‘string’ && method.charAt(0) != ‘_’ && methods[method]) {

// make sure init is called once
if(method != “showPrompt” && method != “hidePrompt” && method != “hide” && method != “hideAll”)
methods.init.apply(form);

return methods[method].apply(form, Array.prototype.slice.call(arguments, 1));
} else if (typeof method == ‘object’ || !method) {
// default constructor with or without arguments
methods.init.apply(form, arguments);
return methods.attach.apply(form);
} else {
$.error(‘Method ‘ + method + ‘ does not exist in jQuery.validationEngine’);
}
};
})(jQuery);

STEP : 2 jquery.validationEngine-en.js

(function($){
$.fn.validationEngineLanguage = function(){
};
$.validationEngineLanguage = {
newLang: function(){
$.validationEngineLanguage.allRules = {
“required”: { // Add your regex rules here, you can take telephone as an example
“regex”: “none”,
“alertText”: “* This field is required”,
“alertTextCheckboxMultiple”: “* Please select an option”,
“alertTextCheckboxe”: “* This checkbox is required”
},
“minSize”: {
“regex”: “none”,
“alertText”: “* Minimum “,
“alertText2″: ” characters allowed”
},
“maxSize”: {
“regex”: “none”,
“alertText”: “* Maximum “,
“alertText2″: ” characters allowed”
},
“min”: {
“regex”: “none”,
“alertText”: “* Minimum value is ”
},
“max”: {
“regex”: “none”,
“alertText”: “* Maximum value is ”
},
“past”: {
“regex”: “none”,
“alertText”: “* Date prior to ”
},
“future”: {
“regex”: “none”,
“alertText”: “* Date past ”
},
“maxCheckbox”: {
“regex”: “none”,
“alertText”: “* Checks allowed Exceeded”
},
“minCheckbox”: {
“regex”: “none”,
“alertText”: “* Please select “,
“alertText2″: ” options”
},
“equals”: {
“regex”: “none”,
“alertText”: “* Fields do not match”
},
“phone”: {
// credit: jquery.h5validate.js / orefalo
“regex”: /^([\+][0-9]{1,3}[ \.\-])?([\(]{1}[0-9]{2,6}[\)])?([0-9 \.\-\/]{3,20})((x|ext|extension)[ ]?[0-9]{1,4})?$/,
“alertText”: “* Invalid phone number”
},
“email”: {
// Simplified, was not working in the Iphone browser
“regex”: /^([A-Za-z0-9_\-\.\’])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,6})$/,
“alertText”: “* Invalid email address”
},
“integer”: {
“regex”: /^[\-\+]?\d+$/,
“alertText”: “* Not a valid integer”
},
“number”: {
// Number, including positive, negative, and floating decimal. credit: orefalo
“regex”: /^[\-\+]?(([0-9]+)([\.,]([0-9]+))?|([\.,]([0-9]+))?)$/,
“alertText”: “* Invalid floating decimal number”
},
“date”: {
“regex”: /^\d{4}[\/\-](0?[1-9]|1[012])[\/\-](0?[1-9]|[12][0-9]|3[01])$/,
“alertText”: “* Invalid date, must be in YYYY-MM-DD format”
},
“ipv4”: {
“regex”: /^((([01]?[0-9]{1,2})|(2[0-4][0-9])|(25[0-5]))[.]){3}(([0-1]?[0-9]{1,2})|(2[0-4][0-9])|(25[0-5]))$/,
“alertText”: “* Invalid IP address”
},
“url”: {
“regex”: /^(https?|ftp):\/\/(((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&’\(\)\*\+,;=]|:)*@)?(((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]))|((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?)(:\d*)?)(\/((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&’\(\)\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&’\(\)\*\+,;=]|:|@)*)*)?)?(\?((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&’\(\)\*\+,;=]|:|@)|[\uE000-\uF8FF]|\/|\?)*)?(\#((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&’\(\)\*\+,;=]|:|@)|\/|\?)*)?$/,
“alertText”: “* Invalid URL”
},
“onlyNumberSp”: {
“regex”: /^[0-9\ ]+$/,
“alertText”: “* Numbers only”
},
“onlyLetterSp”: {
“regex”: /^[a-zA-Z\ \’]+$/,
“alertText”: “* Letters only”
},
“onlyLetterNumber”: {
“regex”: /^[0-9a-zA-Z]+$/,
“alertText”: “* No special characters allowed”
},
// — CUSTOM RULES — Those are specific to the demos, they can be removed or changed to your likings
“ajaxUserCall”: {
“url”: “ajaxValidateFieldUser”,
// you may want to pass extra data on the ajax call
“extraData”: “name=eric”,
“alertText”: “* This user is already taken”,
“alertTextLoad”: “* Validating, please wait”
},
“ajaxUserCallPhp”: {
“url”: “phpajax/ajaxValidateFieldUser.php”,
// you may want to pass extra data on the ajax call
“extraData”: “name=eric”,
// if you provide an “alertTextOk”, it will show as a green prompt when the field validates
“alertTextOk”: “* This username is available”,
“alertText”: “* This user is already taken”,
“alertTextLoad”: “* Validating, please wait”
},
“ajaxNameCall”: {
// remote json service location
“url”: “ajaxValidateFieldName”,
// error
“alertText”: “* This name is already taken”,
// if you provide an “alertTextOk”, it will show as a green prompt when the field validates
“alertTextOk”: “* This name is available”,
// speaks by itself
“alertTextLoad”: “* Validating, please wait”
},
“ajaxNameCallPhp”: {
// remote json service location
“url”: “phpajax/ajaxValidateFieldName.php”,
// error
“alertText”: “* This name is already taken”,
// speaks by itself
“alertTextLoad”: “* Validating, please wait”
},
“validate2fields”: {
“alertText”: “* Please input HELLO”
}
};

}
};
$.validationEngineLanguage.newLang();
})(jQuery);

STEP :3 jquery-1.5.1.min.js

/*!
* jQuery JavaScript Library v1.5.1
* http://jquery.com/
*
* Copyright 2011, John Resig
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://jquery.org/license
*
* Includes Sizzle.js
* http://sizzlejs.com/
* Copyright 2011, The Dojo Foundation
* Released under the MIT, BSD, and GPL Licenses.
*
* Date: Wed Feb 23 13:55:29 2011 -0500
*/
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cellspacing=’0′><tr><td></td></tr></table>”;d.extend(b.style,{position:”absolute”,top:0,left:0,margin:0,border:0,width:”1px”,height:”1px”,visibility:”hidden”}),b.innerHTML=j,a.insertBefore(b,a.firstChild),e=b.firstChild,f=e.firstChild,h=e.nextSibling.firstChild.firstChild,this.doesNotAddBorder=f.offsetTop!==5,this.doesAddBorderForTableAndCells=h.offsetTop===5,f.style.position=”fixed”,f.style.top=”20px”,this.supportsFixedPosition=f.offsetTop===20||f.offsetTop===15,f.style.position=f.style.top=””,e.style.overflow=”hidden”,e.style.position=”relative”,this.subtractsBorderForOverflowNotVisible=f.offsetTop===-5,this.doesNotIncludeMarginInBodyOffset=a.offsetTop!==i,a.removeChild(b),a=b=e=f=g=h=null,d.offset.initialize=d.noop},bodyOffset:function(a){var b=a.offsetTop,c=a.offsetLeft;d.offset.initialize(),d.offset.doesNotIncludeMarginInBodyOffset&&(b+=parseFloat(d.css(a,”marginTop”))||0,c+=parseFloat(d.css(a,”marginLeft”))||0);return{top:b,left:c}},setOffset:function(a,b,c){var e=d.css(a,”position”);e===”static”&&(a.style.position=”relative”);var f=d(a),g=f.offset(),h=d.css(a,”top”),i=d.css(a,”left”),j=e===”absolute”&&d.inArray(“auto”,[h,i])>-1,k={},l={},m,n;j&&(l=f.position()),m=j?l.top:parseInt(h,10)||0,n=j?l.left:parseInt(i,10)||0,d.isFunction(b)&&(b=b.call(a,c,g)),b.top!=null&&(k.top=b.top-g.top+m),b.left!=null&&(k.left=b.left-g.left+n),”using”in b?b.using.call(a,k):f.css(k)}},d.fn.extend({position:function(){if(!this[0])return null;var a=this[0],b=this.offsetParent(),c=this.offset(),e=cf.test(b[0].nodeName)?{top:0,left:0}:b.offset();c.top-=parseFloat(d.css(a,”marginTop”))||0,c.left-=parseFloat(d.css(a,”marginLeft”))||0,e.top+=parseFloat(d.css(b[0],”borderTopWidth”))||0,e.left+=parseFloat(d.css(b[0],”borderLeftWidth”))||0;return{top:c.top-e.top,left:c.left-e.left}},offsetParent:function(){return this.map(function(){var a=this.offsetParent||c.body;while(a&&(!cf.test(a.nodeName)&&d.css(a,”position”)===”static”))a=a.offsetParent;return a})}}),d.each([“Left”,”Top”],function(a,c){var e=”scroll”+c;d.fn[e]=function(c){var f=this[0],g;if(!f)return null;if(c!==b)return this.each(function(){g=cg(this),g?g.scrollTo(a?d(g).scrollLeft():c,a?c:d(g).scrollTop()):this[e]=c});g=cg(f);return g?”pageXOffset”in g?g[a?”pageYOffset”:”pageXOffset”]:d.support.boxModel&&g.document.documentElement[e]||g.document.body[e]:f[e]}}),d.each([“Height”,”Width”],function(a,c){var e=c.toLowerCase();d.fn[“inner”+c]=function(){return this[0]?parseFloat(d.css(this[0],e,”padding”)):null},d.fn[“outer”+c]=function(a){return this[0]?parseFloat(d.css(this[0],e,a?”margin”:”border”)):null},d.fn[e]=function(a){var f=this[0];if(!f)return a==null?null:this;if(d.isFunction(a))return this.each(function(b){var c=d(this);c[e](a.call(this,b,c[e]()))});if(d.isWindow(f)){var g=f.document.documentElement[“client”+c];return f.document.compatMode===”CSS1Compat”&&g||f.document.body[“client”+c]||g}if(f.nodeType===9)return Math.max(f.documentElement[“client”+c],f.body[“scroll”+c],f.documentElement[“scroll”+c],f.body[“offset”+c],f.documentElement[“offset”+c]);if(a===b){var h=d.css(f,e),i=parseFloat(h);return d.isNaN(i)?h:i}return this.css(e,typeof a===”string”?a:a+”px”)}}),a.jQuery=a.$=d})(window);

 

STEP : 5 template.css

body {
background: #ececec;
}

form.formular {
font-family: tahoma, verdana, “sans-serif”;
font-size: 12px;
padding: 20px;
border: 1px solid #A5A8B8;
width: 300px;
margin: 0 auto;
}

.formular fieldset {
margin-top: 20px;
padding: 15px;
border: 1px solid #B5B8C8;
}

.formular legend {
font-size: 12px;
color: #15428B;
font-weight: 900;
}

.formular fieldset label {
float: none;
text-align: inherit;
width: auto;
}

.formular label span {
color: #000;
}

.formular input,.formular select,.formular textarea {
display: block;
margin-bottom: 5px;
}

.formular .text-input {
width: 250px;
color: #555;
padding: 4px;
border: 1px solid #B5B8C8;
font-size: 14px;
margin-top: 4px;
background: #FFF repeat-x;
}

.formular textarea {
width: 250px;
height: 70px;
color: #555;
padding: 4px;
border: 1px solid #B5B8C8;
font-size: 14px;
margin-top: 4px;
background: #FFF repeat-x;
}

.formular .infos {
background: #FFF;
color: #333;
font-size: 12px;
padding: 10px;
margin-bottom: 10px;
}

.formular span.checkbox,.formular .checkbox {
display: inline;
}

.formular .submit {

border: 1px solid #AAA;
padding: 4px;
margin-top: 20px;
float: right;
text-decoration: none;
cursor: pointer;
}

.formular hr {
clear: both;
visibility: hidden;
}

.formular .fc-error {
width: 350px;
color: 555;
padding: 4px;
border: 1px solid #B5B8C8;
font-size: 12px;
margin-bottom: 15px;
background: #FFEAEA;
}

STEP:6 validationEngine.jquery.css

.inputContainer {
position: relative;
float: left;
}

.formError {
position: absolute;
top: 300px;
left: 300px;
display: block;
z-index: 5000;
cursor: pointer;
}

.ajaxSubmit {
padding: 20px;
background: #55ea55;
border: 1px solid #999;
display: none
}

.formError .formErrorContent {
width: 100%;
background: #ee0101;
position:relative;
z-index:5001;
color: #fff;
width: 150px;
font-family: tahoma;
font-size: 11px;
border: 2px solid #ddd;
box-shadow: 0 0 6px #000;
-moz-box-shadow: 0 0 6px #000;
-webkit-box-shadow: 0 0 6px #000;
padding: 4px 10px 4px 10px;
border-radius: 6px;
-moz-border-radius: 6px;
-webkit-border-radius: 6px;
}

.greenPopup .formErrorContent {
background: #33be40;
}

.blackPopup .formErrorContent {
background: #393939;
color: #FFF;
}

.formError .formErrorArrow {
width: 15px;
margin: -2px 0 0 13px;
position:relative;
z-index: 5006;
}

.formError .formErrorArrowBottom {
box-shadow: none;
-moz-box-shadow: none;
-webkit-box-shadow: none;
margin: 0px 0 0 12px;
top:2px;
}

.formError .formErrorArrow div {
border-left: 2px solid #ddd;
border-right: 2px solid #ddd;
box-shadow: 0 2px 3px #444;
-moz-box-shadow: 0 2px 3px #444;
-webkit-box-shadow: 0 2px 3px #444;
font-size: 0px;
height: 1px;
background: #ee0101;
margin: 0 auto;
line-height: 0;
font-size: 0;
display: block;
}

.formError .formErrorArrowBottom div {
box-shadow: none;
-moz-box-shadow: none;
-webkit-box-shadow: none;
}

.greenPopup .formErrorArrow div {
background: #33be40;
}

.blackPopup .formErrorArrow div {
background: #393939;
color: #FFF;
}

.formError .formErrorArrow .line10 {
width: 15px;
border: none;
}

.formError .formErrorArrow .line9 {
width: 13px;
border: none;
}

.formError .formErrorArrow .line8 {
width: 11px;
}

.formError .formErrorArrow .line7 {
width: 9px;
}

.formError .formErrorArrow .line6 {
width: 7px;
}

.formError .formErrorArrow .line5 {
width: 5px;
}

.formError .formErrorArrow .line4 {
width: 3px;
}

.formError .formErrorArrow .line3 {
width: 1px;
border-left: 2px solid #ddd;
border-right: 2px solid #ddd;
border-bottom: 0 solid #ddd;
}

.formError .formErrorArrow .line2 {
width: 3px;
border: none;
background: #ddd;
}

.formError .formErrorArrow .line1 {
width: 1px;
border: none;
background: #ddd;
}

STEP :7 page.html

<!DOCTYPE html>
<html>
<head>
<meta http-equiv=”Content-type” content=”text/html; charset=utf-8″ />
<title>JQuery Validation Engine</title>
<link rel=”stylesheet” href=”validationEngine.jquery.css” type=”text/css”/>
<link rel=”stylesheet” href=”template.css” type=”text/css”/>
<script src=”jquery-1.5.1.min.js” type=”text/javascript”>
</script>
<script src=”jquery.validationEngine-en.js” type=”text/javascript” charset=”utf-8″>
</script>

<script src=”jquery.validationEngine.js” type=”text/javascript” charset=”utf-8″>
</script>
<script>
jQuery(document).ready(function(){
// binds form submission and fields to the validation engine
jQuery(“#formID”).validationEngine();
});

/**
*
* @param {jqObject} the field where the validation applies
* @param {Array[String]} validation rules for this field
* @param {int} rule index
* @param {Map} form options
* @return an error string if validation failed
*/
function checkHELLO(field, rules, i, options){
if (field.val() != “HELLO”) {
// this allows to use i18 for the error msgs
return options.allrules.validate2fields.alertText;
}
}
</script>
</head>
<body>

<form id=”formID” method=”post” action=””>
<fieldset>
<legend>

</legend>
<label>
<span>Field is required : </span>
<input value=”” type=”text” name=”req” id=”req” />
</label>
<label>

<span>Favorite sport 1:</span>
<select name=”sport” id=”sport”>

<option value=””>Choose a sport</option>
<option value=”option1″>Tennis</option>
<option value=”option2″>Football</option>
<option value=”option3″>Golf</option>
</select>
</label>
<label>

<span>Favorite sport 2:</span>
<select name=”sport2″ id=”sport2″ multiple>
<option value=””>Choose a sport</option>
<option value=”option1″><l i>Tennis</li></option>
<option value=”option2″>Football</option>
<option value=”option3″>Golf</option>

</select>
</label>
<br/>
validate[required]
</fieldset>
<fieldset>
<legend>
Custom
</legend>
<label>

<div> Comes with many predifined regex (phone, url, ip, email..etc) </div><a href=”demoRegExp.html”>[DEMO]</a>
<br/>
<span>Enter a URL : </span>
<input value=”http://&#8221; type=”text” name=”url” id=”url” />
<br/>
validate[required,custom[url]]
</label>

</fieldset>
<fieldset>
<legend>
Equals
</legend>
<label>
<span>Password : </span>
<input value=”karnius” type=”password” name=”password” id=”password” />
</label>

<label>
<span>Confirm password : </span>
<input value=”kaniusBAD” type=”password” name=”password2″ id=”password2″ />
<br/>
validate[required,equals[password]]
</label>
</fieldset>
<fieldset>
<legend>

Function
</legend>
<label>
<span>Write ‘HELLO’ : </span>
<input value=”” type=”text” id=”lastname” name=”lastname” />
<br/>
validate[required,funcCall[checkHELLO]]
</label>
</fieldset>

<fieldset>
<legend>
MinSize
</legend>
<label>
Minimum field size
<br/>
<input value=”” type=”text” name=”minsize” id=”minsize” />
<br/>
validate[required,minSize[6]]
</label>

</fieldset>
<fieldset>
<legend>
MaxSize
</legend>
<label>
Maximum field size, optional
<br/>
<input value=”0123456789″ type=”text” name=”maxsize” id=”maxsize” />
<br/>

validate[optional,maxSize[6]]
</label>
</fieldset>
<fieldset>
<legend>
Min
</legend>
<label>
integer >= -5
<br/>

<input value=”-7″ type=”text” name=”min” id=”min” />
<br/>
validate[required,custom[integer],min[-5]]
</label>
</fieldset>
<fieldset>
<legend>
Max
</legend>
<label>

integer ,50]
<br/>
<input value=”55″ type=”text” name=”max” id=”max” />
<br/>
validate[required,custom[integer],max[50]]
</label>
</fieldset>
<fieldset>
<legend>
Past
</legend>

<label>
Checks that the value is a date in the past
<br/>
<span>Please enter a date ealier than 2010/01/01</span>
<input value=”2009/06/30″ type=”text” name=”past” id=”past” />
<br/>
validate[custom[date],past[2010/01/01]]
</label>
</fieldset>

<fieldset>
<legend>
Future
</legend>
<label>
Checks that the value is a date in the future
<br/>
<span>Please enter a date older than today’s date</span>
<input value=”2011-01-” type=”text” name=”future” id=”future” />

<br/>
validate[custom[date],future[NOW]]
</label>
</fieldset>

<input type=”submit” value=”Validate & Send the form!”/><hr/>
</form>
</body>
</html>

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convert one image to multiple size images ( Image Resize )


Hello Friend…

Here i am trying to develop one demo for image resize.

here i create multiple size images from one image using php.

index.php

—————————————————————————————————————————————————–

<?php
include(“easythumbnail.class.php”);

$product_no=1;
$dir = opendir(“products”);
while (($file = readdir($dir)) !== false)
{

if(!is_dir($file))
{

$sub_dir = opendir(“products/”.$file);
$product_image_no=1;

while (($sub_file = readdir($sub_dir)) !== false)
{
if($sub_file != ‘.’ and $sub_file != ‘..’)
{
$file_description=explode(“.”,$sub_file);
$source_file        =    “products/”.$file.”/”.$sub_file;

#48×36
$destination_file    =    “upload/p_”.$product_no.”_”.$product_image_no.”_48_36.”.$file_description[1];
$thumb= new EasyThumbnail($source_file, $destination_file, NULL,48,36);
#200×200
$destination_file    =    “upload/p_”.$product_no.”_”.$product_image_no.”_200_200.”.$file_description[1];
$thumb= new EasyThumbnail($source_file, $destination_file, NULL,200,200);
#300×300
$destination_file    =    “upload/p_”.$product_no.”_”.$product_image_no.”_500_500.”.$file_description[1];
$thumb= new EasyThumbnail($source_file, $destination_file, NULL,500,500);

if ($thumb)
echo “Successfully Converted! : $source_file TO $destination_file <br/>”;
else
echo $thumb->getErrorMsg(). ” $source_file TO $destination_file <br/>”;

$product_image_no=$product_image_no+1;
}
}
$product_no=$product_no+1;
}

}
closedir($dir);

?>
—————————————————————————————————————–

easythumbnail.class.php

————————————————————————————————————-

<?
/*
EasyThumbnail – versão 0.1 – Por Rogério Bragil  – Esta classe
cria um thumbnail de uma imagem através de um cálculo de aproximação. Você
pode criar miniaturas de imagens de diferentes tamanhos que o resultado será
uma coleção de thumbnails de dimensões parecidas. Ideal para albuns de fotos,
onde basta você fazer o upload da imagem e deixar a classe gerar o thumbnail.
OBS: trabalha com jpg e png somente.

e-mail: bragil@webdevel.com.br – Qualquer sugestão, dúvida ou crítica serão bem aceitos!
*/
class EasyThumbnail
{
private $debug= true;
private $errflag= false;
private $ext;
private $origem;
private $destino;
private $errormsg;
private $height;
private $width;

function __construct($imagem, $destino,$aprox=NULL,$height=NULL,$width=NULL)
{
$this->height=$height;
$this->width=$width;
// se o arquivo não existir, erro
if (!file_exists($imagem))
{
$this->errormsg= “Arquivo não encontrado.”;
return false;
}
else
{
$this->origem= $imagem;
$this->destino= $destino;
}
// obtém a extensão do arquivo
if (!$this->ext= $this->getExtension($imagem))
{
$this->errormsg= “Tipo de arquivo inválido.”;
return false;
}
// gera a imagem do thumbnail com o caminho e nome do arquivo especificados
$this->createThumbImg($aprox);
}

// retorna as dimensões (x,y) do thumbnail a ser gerado
public function getThumbXY($x, $y, $aprox)
{
if($aprox!=NULL)
{
if ($x >= $y)
{
if ($x > $aprox)
{
$x1= (int)($x * ($aprox/$x));
$y1= (int)($y * ($aprox/$x));
}
else
{
$x1= $x;
$y1= $y;
}
}
else
{
if ($y > $aprox)
{
$x1= (int)($x * ($aprox/$y));
$y1= (int)($y * ($aprox/$y));
}
// Caso a imagem seja menor do que
// deve ser aproximado, mantém tamanho original para o thumb.
else
{
$x1= $x;
$y1= $y;
}
}
$vet= array(“x” => $x1, “y” => $y1);
}
else
{
$vet= array(“x” => $this->height, “y” => $this->width);
}

return $vet;
}

// cria a imagem do thumbnail
private function createThumbImg($aprox)
{
// imagem de origem
$img_origem= $this->createImg();

// obtém as dimensões da imagem original
$origem_x= ImagesX($img_origem);
$origem_y= ImagesY($img_origem);

// obtém as dimensões do thumbnail
$vetor= $this->getThumbXY($origem_x, $origem_y, $aprox);
$x= $vetor[‘x’];
$y= $vetor[‘y’];

// cria a imagem do thumbnail
$img_final = ImageCreateTrueColor($x, $y);
ImageCopyResampled($img_final, $img_origem, 0, 0, 0, 0, $x+1, $y+1, $origem_x, $origem_y);
// o arquivo é gravado
if ($this->ext == “png”)
imagepng($img_final, $this->destino);
elseif ($this->ext == “jpg”)
imagejpeg($img_final, $this->destino);
}

// cria uma imagem a partir do arquivo de origem
private function createImg()
{
// imagem de origem
if ($this->ext == “png”)
$img_origem= imagecreatefrompng($this->origem);
elseif ($this->ext == “jpg” || $this->ext == “jpeg”)
$img_origem= imagecreatefromjpeg($this->origem);
return $img_origem;
}

// obtém a extensão do arquivo
private function getExtension($imagem)
{
// isso é para obter o mime-type da imagem.
$mime= getimagesize($imagem);

if ($mime[2] == 2)
{
$ext= “jpg”;
return $ext;
}
else
if ($mime[2] == 3)
{
$ext= “png”;
return $ext;
}
else
return false;
}

// mensagem de erro
public function getErrorMsg()
{
return $this->errormsg;
}

public function isError()
{
return $this->errflag;
}
}
?>
————————————————————————————————————————————————

Structure of overview

ups shipping charges calculation


<?php
/**
* UPS Shipping Calculation Class
* @author Hermawan Haryanto
* @date May 26, 2004
* @description
* This class is returning the cost of shipping using UPS
* Tested works for USA
* Please notify me if it’s work for other contry

UPS PRODUCT CODE (this should be in a drop down menu)
Next Day Air Early AM 1DM
Next Day Air 1DA
Next Day Air Saver 1DP
2nd Day Air AM 2DM
2nd Day Air 2DA
3 Day Select 3DS
Ground GND
Canada Standard STD
Worldwide Express XPR
Worldwide Express Plus XDM
Worldwide Expedited XPD

UPS RATE CHART
Regular+Daily+Pickup
On+Call+Air
One+Time+Pickup
Letter+Center
Customer+Counter

Container Chart
Customers Packaging 00

UPS Letter Envelope 01
or
UPS Tube

UPS Express Box 21
UPS Worldwide 25kg Box 22
UPS Worldwide 10 kg Box 23

ResCom UPS Table
Residential 1
Commercial 2
*/
class ups
{
var $_action;
var $_delivery_code;
var $_src_zip;
var $_dst_zip;
var $_weight;
var $_src_country;
var $_dst_country;
var $_rate_chart;
var $_rate_charts;
var $_container;
var $_containers;
var $_rescom;
var $_rescoms;
var $_errors;
function ups()
{
$this->_errors = array();
$this->_action = 3;
$this->_delivery_code = ‘GND’;
$this->_src_country = ‘US’;
$this->_dst_country = ‘US’;
$this->_rate_chart = 1;
$this->_container = ‘0’;
$this->_rescom = 1;
$this->_rate_charts = array(‘Regular+Daily+Pickup’,
‘On+Call+Air’,
‘One+Time+Pickup’,
‘Letter+Center’,
‘Customer+Counter’);
$this->_containers = array (’00’, ’01’, ’21’, ’22’, ’23’, ‘1’, ‘2’);
$this->_rescoms = array (‘1’, ‘2’);

}
function set_rescom ($int)
{
$this->_rescom = $int;
}
function set_container ($int)
{
$this->_container = $int;
}
function set_rate_chart($int)
{
$this->_rate_chart = 1;
}
function set_action($int)
{
$this->_action = $int;
}
function set_delivery_code ($code)
{
$this->_delivery_code = $code;
}
function set_src_zip ($zip)
{
$this->_src_zip = $zip;
}
function set_dst_zip ($zip)
{
$this->_dst_zip = $zip;
}
function set_src_country ($code)
{
$this->_src_country = $code;
}
function set_dst_country ($code)
{
$this->_dst_country = $code;
}
function set_weight ($int)
{
$this->_weight = $int;
}
function get_cost ()
{
if ($this->_action == ”)
array_push ($this->_errors, ‘UPS Action is not defined’);
if ($this->_delivery_code == ”)
array_push ($this->_errors, ‘UPS Product Code is not defined’);
if ($this->_src_zip == ”)
array_push ($this->_errors, ‘Source Zip Code is unavailable’);
if ($this->_src_country == ”)
array_push ($this->_errors, ‘Source Country Code is unavailable’);
if ($this->_dst_zip == ”)
array_push ($this->_errors, ‘Destination Zip Code is unavailable’);
if ($this->_dst_country == ”)
array_push ($this->_errors, ‘Destination Country Code is unavailable’);
if ($this->_weight == ”)
array_push ($this->_errors, ‘Packet weight is not defined’);
if ($this->_rate_chart == ”)
array_push ($this->_errors, ‘Rate Chart is not defined’);
if ($this->_container == ”)
array_push ($this->_errors, ‘Client Shipping Package Type is not defined’);
if ($this->_rescom == ”)
array_push ($this->_errors, ‘Residential or Commercial? define it first!’);
if (count ($this->_errors) <= 0)
{
$url = ‘www.ups.com’;
$port = ’80’;
$file = ‘/using/services/rave/qcostcgi.cgi’;
$qs = ‘?’;
$qs .= ‘accept_UPS_license_agreement=yes’;
$qs .= ‘&’;
$qs .= ’10_action=’.$this->_action;
$qs .= ‘&’;
$qs .= ’13_product=’.$this->_delivery_code;
$qs .= ‘&’;
$qs .= ’14_origCountry=’. $this->_src_country;
$qs .= ‘&’;
$qs .= ’15_origPostal=’. $this->_src_zip;
$qs .= ‘&’;
$qs .= ’19_destPostal=’. $this->_dst_zip;
$qs .= ‘&’;
$qs .= ’22_destCountry=’. $this->_dst_country;
$qs .= ‘&’;
$qs .= ’23_weight=’. $this->_weight;
$qs .= ‘&’;
$qs .= ’47_rateChart=’.$this->_rate_charts[$this->_rate_chart];
$qs .= ‘&’;
$qs .= ’48_container=’.$this->_rate_containers[$this->_rate_container];
$qs .= ‘&’;
$qs .= ’49_residential=’.$this->_rescoms[$this->_rescom];
$rqs = $file.$qs;
$fp = @fsockopen ($url, 80, &$errno, &$errstr, 30);
if (!$fp)
array_push ($this->_errors, ‘Could not open socket’);
else
{
fputs($fp,”GET $rqs HTTP/1.0\n\n”);
while(!feof($fp))
{
$buffer = fgets ($fp, 1024);
if (strpos ($buffer, ‘%’))
{
$buffers = explode (‘%’, $buffer, -1);
$errcode = substr ($buffers[0], -1);
$goodcodes = array (‘3’, ‘4’, ‘5’, ‘6’);
if (in_array ($errcode, $goodcodes))
{
$cost = trim ($buffers[8]);
return $cost;
}
else array_push ($this->_errors, ‘Bad Result’);
}
}
fclose($fp);
}
}
}
}
$ups = new ups;
$ups->set_src_zip(‘08053’);
$ups->set_dst_zip(‘08055’);
$ups->set_weight (5);
$ups_cost = $ups->get_cost();
if (!$ups_cost) print_r ($ups->_errors);
else print $ups_cost;
?>

Email send in non english and with special characters


$data[‘username’] = $_POST[‘username’];
$data[’email’] = $_POST[’email’];
$to = “demo@example.com”;
$subject = trim($_REQUEST[“subject”]);
$message = trim($_REQUEST[“discription”]);
$from = “info@carshare.com”;
$headers  = “From: $from\r\n”;
$headers .= “MIME-Version: 1.0\r\n”;
$headers .= “Content-Type: text/html; charset=utf8\r\n”;
mail($to,$subject,$message,$headers);

10+ Mod_Rewrite Rules You Should Know


Mod_rewrite is an Apache-based rewrite engine for dynamically rewriting URLs. It’s built into Apache servers natively, though not enabled by default.

It’s capable of functions beyond simple rewrites, though, some of which are included below.


Modrewrite-image1 in 10+ Mod_Rewrite Rules You Should Know

Turn Mod_Rewrite On

Mod_rewrite is used through your .htaccess file. Place the following code at the beginning of your .htaccess file to turn mod_rewrite on:

  1. RewriteEngine on

(Don’t forget that .htaccess commands are case-sensitive.) This code needs to be entered at the beginning of any .htaccess file using mod_rewrite.

The Basic Mod_Rewrite Layout

The basic format for a mod_rewrite command is:

  1. RewriteRule Pattern Substitution [Flag(s)]

URLs are Always Relative

The URL you redirect to is always relative to the directory in which your .htaccess file is placed. So if it’s in the root directory, URLs are all in relation to the root directory; if it’s in a sudirectory, URLs are in relation to that particular subdirectory.

A Basic Redirect

If you just want to create a simple 301 redirect from one URL to another, then use the following code:

  1. RewriteRule ^fileone.html$ filetwo.html

This is a very basic rule that means any requests for fileone.html will be sent to filetwo.html.

Require no “www”

This bit of code will make it so visitors to your site don’t need to type in the “www” bit of your website address.

  1. RewriteCond %{HTTP_HOST} !^domain\.com$ [NC]
  2. RewriteRule ^(.*)$ http://domain.com/$1 [R=301,L]

Block a Specific IP Address

If you want to block someone coming from a specific IP address from accessing your website, you can use the following code:

  1. RewriteCond %{REMOTE_ADDR} ^(A\.B\.C\.D)$
  2. RewriteRule ^/* http://www.domain.com/sorry.html [L]

Replace the A\.B\.C\.D with the IP address you want to block (don’t forget to leave the “\” before each dot, which escapes the character).

Block Specific User Agents

If you want to block a group of IP addresses using the same User Agent (bot), the following code with do it:

  1. RewriteCond %{HTTP_USER_AGENT} UserAgent
  2. RewriteRule .* – [F,L]

Just replace the “UserAgent” bit with whatever user agent you want to block. You can also block more than one at a time by replacing the top line in that code with something like this:

  1. RewriteCond %{HTTP_USER_AGENT} UserAgentA [OR]
  2. RewriteCond %{HTTP_USER_AGENT} UserAgentB

You can put as many user agents in as you want, just make sure you end each line with [OR] (with the exception of the last line, of course).

Modrewrite-image2 in 10+ Mod_Rewrite Rules You Should Know

Strip Query Strings

Let’s say all the pages on your site other than your home page are formatted as follows, with query strings instead of page names:

http://www.domain.com/home.html?example=12345abcd

Those aren’t very pretty, and on top of that, search engines will show a bunch of duplicated “home” pages. If you want to get rid of the query string in your page URLs, use the following code:

  1. RewriteCond %{QUERY_STRING} example=
  2. RewriteRule (.*) http://www.domain.com/$1? [R=301]

This not only gets rid of the query string, but also the preceding question mark.

Set up a Default Image

Using a default, backup image in case of broken images can make your site look more professional. Use the following code to redirect to a default image for any image whose file cannot be found.

  1. RewriteCond %{REQUEST_FILENAME} !-f
  2. RewriteRule ^images/.*\.jpg$ /images/default.jpg [L]

Of course, you can change the “.jpg” bit to whatever file type you’re using. Make sure you have an image called “default.jpg” or change that to whatever your default image filename is.

Prevent Hotlinking

The last thing most website owners want is other sites stealing their content or worse—hotlinking to their images and stealing their bandwidth. Here’s a simple bit of code that prevents it:

  1. RewriteCond %{HTTP_REFERER} !^$
  2. RewriteCond %{HTTP_REFERER} !^http://(www\.)?domain.com/ .*$ [NC]
  3. RewriteRule \.(gif|jpg|swf|flv|png)$ /feed/ [R=302,L]

Make sure you change the “domain.com” bit to your own domain name.

Redirect to a Maintenance Page

If you need to take your entire site offline for a bit and redirect to a maintenance page (or some other page), use the following code:

  1. RedirectMatch 302 ^/ /maintenancepage.html

Change the “maintenancepage.html” bit to wherever your maintenance page file is located.

Redirect Multiple Domains to a Single Domain

If you have multiple domains pointing to your site, it’s possible you could take a hit in the search engines for having duplicate content. Use the following code to redirect visitors from two domains to just one:

  1. RewriteCond %{HTTP_HOST} ^www.domain.net$ [NC,OR]
  2. RewriteCond %{HTTP_HOST} ^domain.net$ [NC,OR]
  3. RewriteCond %{HTTP_HOST} ^www.domain.net$ [NC]
  4. RewriteRule ^(.*)$ http://domain.net/$1 [R=301,L]

Remember the Filesystem Always Takes Precedence

The filesystem on your server will always take precedence over the rewritten URL. For example, if you have a directory named “services” and within that directory is a file called “design.html”, you can’t have the URL redirect to “http://domain.com/services”. What happens is that Apache goes into the “services” directory and doesn’t see the rewrite instructions.

To fix this, simply rename your directory (adding an underscore to the beginning or end is a simple way to do that).

Remember:

  • Because mod_rewrite works within the .htaccess file, commands are case sensitive.
  • Always back up your .htaccess file before making any changes to it. This way, if there’s a problem, you can easily restore your site.

More Resources:

Getting Started with PHP Regular Expressions


 

The main purpose of regular expressions, also called regex or regexp, is to efficiently search for patterns in a given text. These search patterns are written using a special format which a regular expression parser understands.

Express-1 in Getting Started with PHP Regular Expressions

Regular expressions are originating from Unix systems, where a program was designed, called grep, to help users work with strings and manipulate text. By following a few basic rules, one can create very complex search patterns.

As an example, let’s say you’re given the task to check wether an e-mail or a telephone number has the correct form. Using a few simple commands these problems can easily be solved thanks to regular expressions. The syntax doesn’t always seems straightforward at first, but once you learn it, you’ll realize that you can do pretty complex searches easily, just by typing in a few characters and you’ll approach problems from a different perspective.

2. Perl Compatible Regular Expressions

PHP has implemented quite a few regex functions which uses different parsing engines. There are two major parser in PHP. One called POSIX and the other PCRE or Perl Compatible Regular Expression.

The PHP function prefix for POSIX is ereg_. Since the release of PHP 5.3 this engine is deprecated, but let’s have a look at the more optimal and faster PCRE engine.

In PHP every PCRE function starts with preg_ such as preg_match or preg_replace. You can read the full function list in PHP’s documentation.

3. Basic Syntax

To use regular expressions first you need to learn the syntax. This syntax consists in a series of letters, numbers, dots, hyphens and special signs, which we can group together using different parentheses.

In PHP every regular expression pattern is defined as a string using the Perl format. In Perl, a regular expression pattern is written between forward slashes, such as /hello/. In PHP this will become a string, ‘/hello/’.

Now, let’s have a look at some operators, the basic building blocks of regular expressions

Operator Description
^ The circumflex symbol marks the beginning of a pattern, although in some cases it can be omitted
$ Same as with the circumflex symbol, the dollar sign marks the end of a search pattern
. The period matches any single character
? It will match the preceding pattern zero or one times
+ It will match the preceding pattern one or more times
* It will match the preceding pattern zero or more times
| Boolean OR
Matches a range of elements
() Groups a different pattern elements together
[] Matches any single character between the square brackets
{min, max} It is used to match exact character counts
\d Matches any single digit
\D Matches any single non digit caharcter
\w Matches any alpha numeric character including underscore (_)
\W Matches any non alpha numeric character excluding the underscore character
\s Matches whitespace character

As an addition in PHP the forward slash character is escaped using the simple slash \. Example: ‘/he\/llo/’

To have a brief understanding how these operators are used, let’s have a look at a few examples:

Example Description
‘/hello/’ It will match the word hello
‘/^hello/’ It will match hello at the start of a string. Possible matches are hello or helloworld, but not worldhello
‘/hello$/’ It will match hello at the end of a string.
‘/he.o/’ It will match any character between he and o. Possible matches are helo or heyo, but not hello
‘/he?llo/’ It will match either llo or hello
‘/hello+/’ It will match hello on or more time. E.g. hello or hellohello
‘/he*llo/’ Matches llo, hello or hehello, but not hellooo
‘/hello|world/’ It will either match the word hello or world
‘/(A-Z)/’ Using it with the hyphen character, this pattern will match every uppercase character from A to Z. E.g. A, B, C…
‘/[abc]/’ It will match any single character a, b or c
‘/abc{1}/’ Matches precisely one c character after the characters ab. E.g. matches abc, but not abcc
‘/abc{1,}/’ Matches one or more c character after the characters ab. E.g. matches abc or abcc
‘/abc{2,4}/’ Matches between two and four c character after the characters ab. E.g. matches abcc, abccc or abcccc, but not abc

Besides operators, there are regular expression modifiers, which can globally alter the behavior of search patterns.

The regex modifiers are placed after the pattern, like this ‘/hello/i’ and they consists of single letters such as i which marks a pattern case insensitive or x which ignores white-space characters. For a full list of modifiers please visit PHP’s online documentation.

The real power of regular expressions relies in combining these operators and modifiers, therefore creating rather complex search patterns.

4. Using Regex in PHP

Express-2 in Getting Started with PHP Regular Expressions

In PHP we have a total of nine PCRE functions which we can use. Here’s the list:

  • preg_filter – performs a regular expression search and replace
  • preg_grep – returns array entries that match a pattern
  • preg_last_error – returns the error code of the last PCRE regex execution
  • preg_match – perform a regular expression match
  • preg_match_all – perform a global regular expression match
  • preg_quote – quote regular expression characters
  • preg_replace – perform a regular expression search and replace
  • preg_replace_callback – perform a regular expression search and replace using a callback
  • preg_split – split string by a regular expression

The two most commonly used functions are preg_match and preg_replace.

Let’s begin by creating a test string on which we will perform our regular expression searches. The classical hello world should do it.

  1. $test_string‘hello world’;

If we simply want to search for the word hello or world then the search pattern would look something like this:

  1. preg_match(‘/hello/’$test_string);
  2. preg_match(‘/world/’$test_string);

If we wish to see if the string begins with the word hello, we would simply put the ^ character in the beginning of the search pattern like this:

  1. preg_match(‘/^hello/’$test_string);

Please note that regular expressions are case sensitive, the above pattern won’t match the word hElLo. If we want our pattern to be case insensitive we should apply the following modifier:

  1. preg_match(‘/^hello/i’$test_string);

Notice the character i at the end of the pattern after the forward slash.

Now let’s examine a more complex search pattern. What if we want to check that the first five characters in the string are alpha numeric characters.

  1. preg_match(‘/^[A-Za-z0-9]{5}/’$test_string);

Let’s dissect this search pattern. First, by using the caret character (^) we specify that the string must begin with an alpha numeric character. This is specified by [A-Za-z0-9].

A-Z means all the characters from A to Z followed by a-z which is the same except for lowercase character, this is important, because regular expressions are case sensitive. I think you’ll figure out by yourself what 0-9 means.

{5} simply tells the regex parser to count exactly five characters. If we put six instead of five, the parser wouldn’t match anything, because in our test string the word hello is five characters long, followed by a white-space character which in our case doesn’t count.

Also, this regular expression could be optimized to the following form:

  1. preg_match(‘/^\w{5}/’$test_string);

\w specifies any alpha numeric characters plus the underscore character (_).

6. Useful Regex Functions

Here are a few PHP functions using regular expressions which you could use on a daily basis.

Validate e-mail. This function will validate a given e-mail address string to see if it has the correct form.

  1. function validate_email($email_address)
  2. {
  3. if( !preg_match(“/^([a-zA-Z0-9])+([a-zA-Z0-9\._-])*@([a-zA-Z0-9_-])+
  4. ([a-zA-Z0-9\._-]+)+$/”$email_address))
  5. {
  6. return false;
  7. }
  8. return true;
  9. }

Validate a URL

  1. function validate_url($url)
  2. {
  3. return preg_match(‘|^http(s)?://[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?
  4. (/.*)?$|i’$url);
  5. }

Remove repeated words. I often found repeated words in a text, such as this this. This handy function will remove such duplicate words.

  1. function remove_duplicate_word($text)
  2. {
  3. return preg_replace(“/s(w+s)1/i”“$1”$text);
  4. }

Validate alpha numeric, dashes, underscores and spaces

  1. function validate_alpha($text)
  2. {
  3. return preg_match(“/^[A-Za-z0-9_- ]+$/”$text);
  4. }

Validate US ZIP codes

  1. function validate_zip($zip_code)
  2. {
  3. return preg_match(“/^([0-9]{5})(-[0-9]{4})?$/i”,$zip_code);
  4. }

7. Regex Cheat Sheet

Because cheat sheets are cool nowadays, below you can find a PCRE cheat sheet that you can run through quickly anytime you forget something.

Meta Characters

Description
^ Marks the start of a string
$ Marks the end of a string
. Matches any single character
| Boolean OR
() Group elements
[abc] Item in range (a,b or c)
[^abc] NOT in range (every character except a,b or c)
\s White-space character
a? Zero or one b characters. Equals to a{0,1}
a* Zero or more of a
a+ One or more of a
a{2} Exactly two of a
a{,5} Up to five of a
a{5,10} Between five to ten of a
\w Any alpha numeric character plus underscore. Equals to [A-Za-z0-9_]
\W Any non alpha numeric characters
\s Any white-space character
\S Any non white-space character
\d Any digits. Equals to [0-9]
\D Any non digits. Equals to [^0-9]

Pattern Modifiers

Description
i Ignore case
m Multiline mode
S Extra analysis of pattern
u Pattern is treated as UTF-8

8. Useful Readings