Usage:

You can download the mlCaptcha zip which contains all the files needed to implement the script including the required font.

Place the following code on your form. This will generate an image with a random string of Malayalam Unicode characters along with the text field where the user will retype the code.

[ basic usage ]
<img src="mlCaptcha.php" />
<input id="security_code" name="security_code" type="text" />

You can also specify certain options for the image by passing them as variables to mlCaptcha.php. The options available are the width and height of the image and the number of characters.

[ advanced usage ]
<img src="mlCaptcha.php?width=200&height=40&characters=6" />
<input id="security_code" name="security_code" type="text" />

Place the following in the code where the form is submitted to. This code will check what the user has typed matches the code in the image.

[ checking the captcha ]
<?php 
   session_start();
   if(($_SESSION['security_code'] == $_POST['security_code']) && (!empty($_SESSION['security_code'])) ) {
	 // Insert you code for processing the form here, e.g emailing the submission, entering it into a database. 
     unset($_SESSION['security_code']); 
   } else {
	 // Insert your code for showing an error message here
   }
?>