Calling php functions by jquery

Calling php functions by using jquery Ajax
<?php 

/*
// return the value of the radio button that is checked
// return an empty string if none are checked, or
// there are no radio buttons
function getCheckedValue(radioObj) {
	if(!radioObj)
		return "";
	var radioLength = radioObj.length;
	if(radioLength == undefined)
		if(radioObj.checked)
			return radioObj.value;
		else
			return "";
	for(var i = 0; i < radioLength; i++) {
		if(radioObj[i].checked) {
			return radioObj[i].value;
		}
	}
	return "";
}
// radio button example
//<input name="mail_type" id="mail_type" type="radio" value="plain" <?php echo (isset($mail_type) && $mail_type == 'plain') ? 'checked="checked"' : '' ; ?> onclick="javascript:change_content_area(this.value);"/>

// set the radio button with the given value as being checked
// do nothing if there are no radio buttons
// if the given value does not exist, all the radio buttons
// are reset to unchecked
function setCheckedValue(radioObj, newValue) {
	if(!radioObj)
		return;
	var radioLength = radioObj.length;
	if(radioLength == undefined) {
		radioObj.checked = (radioObj.value == newValue.toString());
		return;
	}
	for(var i = 0; i < radioLength; i++) {
		radioObj[i].checked = false;
		if(radioObj[i].value == newValue.toString()) {
			radioObj[i].checked = true;
		}
	}
}
// checkbox example
//<input type="checkbox" id=cb'.$i.' name="cid[]" value="'.$val['id'].'" onclick="javascript:isChecked(this.checked);" />





// Function returns true if one radio button is checked from a group else returns false;
function get_check_box_value(check_box_name) {
	var r = '';
	var checkbox = document.getElementsByName(check_box_name);
	for (var i=0; i < checkbox.length; i++)
    {
   		if (checkbox[i].checked)
      	{
      	var r = checkbox[i].value;
      	}
   	}

	if(r != '') {
		return true;
	}
	else {
		return false;
	}
}


// function to validate url
// valid url -	http://www.mysite.com
//			    https://abc.mysite.com
//				http://abc.mysite.co.in
//				http://abc.mysite.com/index.php
//				http://abc.mysite.com/index.php?action=do
function validate_url(url) {

    var RegExp = /^(ftp|https?):(([\w]+:)?\/\/)?(([\d\w]|%[a-fA-f\d]{2,2})+(:([\d\w]|%[a-fA-f\d]{2,2})+)?@)?([\d\w][-\d\w]{0,253}[\d\w]\.)+[\w]{2,4}(:[\d]+)?(\/([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)*(\?(&?([-+_~.\d\w]|%[a-fA-f\d]{2,2})=?)*)?(#([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)?$/;

    if(RegExp.test(url)) {
		// alert('\''+url+'\''+' is a valid URL, Thanks.');
        return true;
    } else {
		alert('\''+url+'\''+' is not a valid URL.');
        return false;
    }
}


// Function returns true if checkbox is checked else false
function validate_chkbox(chkbox_name) {
	return document.getElementById(chkbox_name).checked;
}


// Function to validate credit card numbers
function isValidCreditCard(type, ccnum) {
   // VISA
   if (type == "5") {  
      // Visa: length 16, prefix 4, dashes optional.
      var re = /^4\d{3}-?\d{4}-?\d{4}-?\d{4}$/;
   // MASTER CARD
   } else if (type == "4") {  
      // Mastercard: length 16, prefix 51-55, dashes optional.
      var re = /^5[1-5]\d{2}-?\d{4}-?\d{4}-?\d{4}$/;
   // DISCOVER
   } else if (type == "3") {
      // Discover: length 16, prefix 6011, dashes optional.
      var re = /^6011-?\d{4}-?\d{4}-?\d{4}$/;
   // AMERICAN EXPRESS
   } else if (type == "6") {
      // American Express: length 15, prefix 34 or 37.
      var re = /^3[4,7]\d{13}$/;
   // DINNERS CLUB
   } else if (type == "2") {
      // Diners: length 14, prefix 30, 36, or 38.
      var re = /^3[0,6,8]\d{12}$/;
   }
   if (!re.test(ccnum)) return false;
   // Remove all dashes for the checksum checks to eliminate negative numbers
   ccnum = ccnum.split("-").join("");
   // Checksum ("Mod 10")
   // Add even digits in even length strings or odd digits in odd length strings.
   var checksum = 0;
   for (var i=(2-(ccnum.length % 2)); i<=ccnum.length; i+=2) {
      checksum += parseInt(ccnum.charAt(i-1));
   }
   // Analyze odd digits in even length strings or even digits in odd length strings.
   for (var i=(ccnum.length % 2) + 1; i<ccnum.length; i+=2) {
      var digit = parseInt(ccnum.charAt(i-1)) * 2;
      if (digit < 10) { checksum += digit; } else { checksum += (digit-9); }
   }
   if ((checksum % 10) == 0){ 
   	//alert('TRUE');
   	return true; 
   }else{
   	//alert('FALSE');
   	return false;
   }
}

// validate email address
function validate_email(email)
{
// a very simple email validation checking. 
// you can add more complex email checking if it helps 
    if(email.length <= 0)
	{
	  return true;
	}
    var splitted = email.match("^(.+)@(.+)$");
    if(splitted == null) return false;
    if(splitted[1] != null )
    {
      var regexp_user=/^\"?[\w-_\.]*\"?$/;
      if(splitted[1].match(regexp_user) == null) return false;
    }
    if(splitted[2] != null)
    {
      var regexp_domain=/^[\w-\.]*\.[A-Za-z]{2,4}$/;
      if(splitted[2].match(regexp_domain) == null) 
      {
	    var regexp_ip =/^\[\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\]$/;
	    if(splitted[2].match(regexp_ip) == null) return false;
      }// if
      return true;
    }
return false;
}


// #########################################################
// #########################################################
// JQUERY FUNCTIONS STARTS
// #########################################################
// #########################################################

// Note : Replace '$' with jQuery if it conflicts
// and add " jQuery.noConflict(); "

//<a id="ppsub_ppterm_id"> = $("#ppsub_ppterm_id")

//<a class="ppsub_ppterm_id"> = $(".ppsub_ppterm_id")

//<a name="ppsub_ppterm_id">  = $("*[name=ppsub_ppterm_id]")

// function view_intro(divid) { 
//	var c = "#"+divid; 
//	$(c).html('Hello');
// }

// This function returns value of checkbox if checkbox is checked else 0;
function get_chkbox_value(chkbox_name) {
	var chkbox = $("input:checkbox[name="+chkbox_name+"]");
	var rs = chkbox.attr("checked") ? chkbox.val() : 0;
	return rs;
}
// OR
function get_chkbox_value2(chkbox_id) {
	var news=$(chkbox_id).is(':checked');
}
// OR
// <input type="checkbox" id=cb name="cid[]" value="'.$row->id.'" />
// <form action="seekers" name="f1" method="post" onsubmit="return check_checked_rows('cb');">
function check_checked_rows(checkboxName) {
	var flagText = false;
	$("input[@id='" + checkboxName + "']:checked").each(
		function(){
			if(this.checked == true){
				if( this.value != ''){
					//alert(this.value);
					flagText = true;
				}
			}
		}    
	);

	if(flagText == false) {
		alert('Please check atleast one row.');
		return false;
	}
	else {
		return true;
	}
}



// This function returns an array which contains values of check checkboxes
function get_all_checked_values() {
	var chkboxes = $("input:checkbox:checked");
}


// Sample ajax function
function showstaticpage(myurl){

	$('#static2').show();

	$.ajax({
		url :myurl,
		type: 'post',
		success: function(data, status) {
			alert(data);
			$("#staticpage2").html(data);
		},
		error: function (data, status, e)
		{
		alert(status);
		alert(e);
		}
    });
}


// Sample load function
function load(param) {
	$("#staticpage").load( "/staticpage",
		{url:param},
		function(data)	{}
	);
}


// sample function to change the css class in jquery
function change_css_class(my_css_class) {
	$('#eventheader').addClass(my_css_class);
	$('#eventheader').attr("class");
	$('#eventheader').removeClass(my_css_class);
}


// Sample function to Populate state name on change of country
function populate_city() {

	$("#ppsub_ppterm_id").change(function(){
					var term = this.options[this.selectedIndex].text;

					if(term == "Eenmalig"){
							$(".idealtd").show();   
					}else{
							$(".idealtd").hide();   
							//$("#ppsub_amount option:selected").val('anders');
					}
	});
}

// show & hide div slowly
function change_category() {
	$('#div-change-category').show('slow');
	$('#div-change-category').hide('slow');

	// css used
	
	//.news-box-search
	//{
	//margin:0; padding:0; float:right; width:390px; position:relative; margin-bottom:-260px; z-index:5; font:normal 10px "Myriad Pro" Arial, Helvetica, sans-serif; color:#9d9c9c;
	//}

	//.overlap{ position:absolute; background:#e0e0e0; padding:8px; margin-top:35px; margin-left:115px; border:#ccc 3px solid;}
	

	// html div used
	
	//<div class="news-box-search overlap" id="div-change-category" style="display:none;">

 	 //<div style="float:right;"><a href="javascript:void(0);" onclick="return close_change_category();"><img src="/images/icon-close.gif" alt="" /></a></div>
 	 //<label>Change Category :</label>

	 //<select name="categories" id="categories">
		//<option value="1">Music</option>
		//<option value="2">Literature</option>
		//<option value="3">Visual Arts</option>				
	 //</select>

	 //<input type="button" name="btn_change_category" id="btn_change_category" value="Change" onclick="return change_category2();" />
    //</div>
}

// ## Getting values from html element through jquery
function get_elements_value() 
{
	// getting drop down value
	// Drop down
	// <select name="posted_year">
	// <option value="">None</option>
	// <option value="2009">2009</option>
	// <option value="2008">2008</option>
	// </select>
	var cat = $('#posted_year').val();
}

// redirect url
function redirect_url(url)
{
	window.location=url;
}

// window onload function
function onready()
{
	$(document).ready(function() {
		var mail_type = '<?php echo $mail_type; ?>';
		change_content_area(mail_type);
		
	});
}
*/
?>
Usage

Calling php functions by using jquery Ajax
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