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jQuery to Select Multiple CheckBox

In this first jQuery tutorial we will develop a simple program that retrieves the value of selected checkbox from server and displays on the user browser. In this example we will be calling a server side PHP script . You can easily replace PHP with JSP, or ASP program.

Steps to develop the Select Multiple CheckBox program

Step 1:

Create php file to that prints the CheckBox data . Here is the code of PHP script (postData.php).

<?php
if($_POST['checkbox_name']!="")
{
echo "You have selected: ";
foreach ($_POST['checkbox_name'] as $checkbox_name)
{

$checkbox_name= htmlspecialchars($checkbox_name, ENT_QUOTES);
echo $checkbox_name, ' ', "\n";
}
}
else
{
echo "Please select the checkbox.";
}
?>

Step 2:

Write HTML page to call the postData.php . Create a new file (checkBoxSelect.php) and add the following code into it:

<html>
<head>
<title>JQuery Tutorial: C<title>
<script type="text/javascript" src="jquery.js"></script>
</head>
<body>
  <script type="text/javascript">
	$(document).ready(function()
	{
	$("#submit").click(
	function()
	{
	var query_string = '';
				
	$("input[@type='checkbox'][@name='checkbox_name']").each(
	function()
	{
	if(this.checked)
		{
			query_string += "&checkbox_name[]=" + this.value;
				}
				});
		$.ajax(
	        {
			type: "POST",
		   	url: "postdata.php",
		   	data: "id=1" + query_string,
		   	success: 
		        function(t) 
			    	{
			          $("div#content").empty().append(t);
		 	   	},
		         	   	error:
				   	function()
				   	{
				    	$("div#content").append("An error 
                                           occured during processing");

				   	}
				        });	
					});
		});
		</script>
		
<span style="color:#00000;font-weight:bold">Select Your Languages</span><br>
		<input type="checkbox" name="checkbox_name" value="English">English<br>
		<input type="checkbox" name="checkbox_name" value="Hindi">Hindi<br>
		<input type="checkbox" name="checkbox_name" value="French">French<br>
		<input type="checkbox" name="checkbox_name" value="Japanese">Japanese<br>
	
		<input type="submit" id="submit" value='Submit' />

		<p>&nbsp;</p>
		
		<div id="content">The results will show up here.</div>
	</body>
</html>

Program explanation:

The following code includes the jQuery JavaScript library file:

The code

$("#submit").click

url : "postData.php",
...

makes ajax call to postData.php file.

Following code intercepts the ajax call success and then sets the data into "content" div:

If return success then it OutPut

When you run the program in browser it will look like following screen shot:

Check online demo of the application

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