<?PHP
// Function Hex2Bin
// By Roberto Bertó <berto@que.com.br> under GPL license. 
// Free like Linux!

// converts a string in hex to a bin string
	function hex2bin ($s) {
		$n = strlen($s);
		if ($n % 2 != 0) { return; }

		for ($x = 1; $x <= $n/2; $x++) {
			$t .= chr(hexdec(substr($s,2* $x - 2,2)));
		}
		return $t;

	}
?>