function execute($sock, $str) {
socket_send($sock, $str.'|', strlen($str) + 1, NULL);
}

function lock2key($_LOCK) {

$lockLength = strlen ($_LOCK);

$h = ord($_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' || // '~'
$a == '124' || // '|'
$a == '96' || // '`'
$a == '36' || // '$'
$a == '5' || // '^E'
$a == '0') // NUL
{
$LockToKey = "/%DCN";

if ($a < 100)
$LockToKey .="0";
if ($a < 10)
$LockToKey .="0";
$LockToKey .= $a;
$LockToKey .= "%/";
} else {
$LockToKey = chr ($a);
}

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' || // '~'
$a == '124' || // '|'
$a == '96' || // '`'
$a == '36' || // '$'
$a == '5' || // '^E'
$a == '0') // NUL
{
$LockToKey .= "/%DCN";

if ($a < 100)
$LockToKey .="0";
if ($a < 10)
$LockToKey .="0";
$LockToKey .= $a;
$LockToKey .= "%/";
} else {
$LockToKey .= chr ($a);
}
}
return $LockToKey;
}