class_mcString.inc.php

<?php
class mcString {
	public static function generateAlphaNumericRandumString($param_length=8) {
		$characters = array(
			"A","B","C","D","E","F","G","H","J","K","L","M",
			"N","P","Q","R","S","T","U","V","W","X","Y","Z",
			"1","2","3","4","5","6","7","8","9"
		);

		$keys = array();

		while(count($keys) < $param_length) {

			$x = mt_rand(0, count($characters)-1);
			if(!in_array($x, $keys)) {
			   $keys[] = $x;
			}
		}

		foreach($keys as $key){
		   $random_chars .= $characters[$key];
		}
		return $random_chars;
	}


}
?>