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Revision: 41063
at February 11, 2011 09:58 by robertdotim
Updated Code 
<?php			

	function validate_alphanum($string)
	{
		$count = 0;
		preg_replace("/[^a-zA-Z0-9]/", "", $string, -1, $count);

		if($count != 0)
		{
			return false;
		}
	
		return true;
	}
	
?>

Revision: 41062
at February 11, 2011 09:44 by robertdotim
Initial Code 
<?php			

	function validate_alphanum($string)
	{
		$count = 0;
		preg_replace("/[^a-zA-Z0-9]/", "", $string, -1, $count);

		if($count != 0)
		{
			return false;
			die();
		}
	
		return true;
	}
	
?>
Initial URL 
http://robert.im
Initial Description 
This function uses the preg_replace counter to check for any non-alphanumeric characters.

You can use this for username / password validation if you don't want any special characters to be used.
Initial Title 
Validate an alphanumeric string
Initial Tags 
php
Initial Language 
PHP