io c'avevo provato ma non funzionava ^^

leggi la mail che ti ho inviato ... nel mio codice sorgente ciè un metodo della classe apposito per fare la cosa

se non erro si chiama Lock2Key

codice:
	// Lock To Key function written by [RO]VeNoM

	/*-------------------
		NOT COMMENTED
	-------------------*/
	
	/**
	 * PHPDCFrameWork::__lock2key()
	 * 
	 * This function decode LOCK sendend from HUB SERVER and CLIENT.
	 * Return decoded LOCK, called KEY
	 * 
	 * @param $_LOCK		// LOCK String
	 * @return 
	 */
	function __lock2key($_LOCK) {
		// Get LOCK String Length
		$LockLength = strlen($_LOCK);

		// Start to Decode FIRST CHAR
		$h = ord($_LOCK{0}) ^ ord( $_LOCK{ $LockLength - 1} ) ^ ord( $_LOCK{ $LockLength - 2} ) ^ 5;
		while ($h > 255) {$h = $h - 256;}
	    $h = (($h<<4) & 240) | (($h>>4) & 15);
		$a = $h;

		if ($a == '126' OR $a == '124' OR $a == '96' OR $a == '36' OR $a == '5' OR $a == '0') {	
			$LockToKey = "/%DCN";
			if ($a < 100) {$LockToKey .= "0";}
			if ($a < 10) {$LockToKey .= "0";}
			$LockToKey .= $a;
			$LockToKey .= "%/";
		} else {
			$LockToKey = chr($a);
		}
	
		// Decode Other Chars
		for ($j = 1; $j < strlen($_LOCK); $j++) {
			$h = ord($_LOCK{$j}) ^ ord($_LOCK{$j-1});
			while ($h > 255) {$h = $h - 256;}
			$h = (($h<<4) & 240) | (($h>>4) & 15);
			$a = $h;
		
			if ($a == '126' OR $a == '124' OR $a == '96' OR $a == '36' OR $a == '5' OR $a == '0') {
				$LockToKey .= "/%DCN";
				if ($a < 100) {$LockToKey .= "0";}
				if ($a < 10) {$LockToKey .= "0";}
		    	$LockToKey .= $a;
				$LockToKey .= "%/";	
			} else {
				$LockToKey .= chr($a);
			}
		}
		
		// Return Dedoced LOCK String
		return $LockToKey;
	}