Generate A random key

key generator

  // Serial Key Generator
	$pool = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	$countPool = count( $pool ) ;
	$totalChars = 12 ;

	$pass = '' ;
	for ( $i = 0 ; $i < $totalChars ; $i++ ) {
	    $currIndex = mt_rand( 0, $countPool ) ;
	    $currChar = $pool[ $currIndex ] ;
	    $pass .= $currChar ;
	}