note 97172 added to function.hexdec

Here My version of converting a hex string to a signed decimal value: <?php function hexdecs($hex) { // ignore non hex characters $hex = preg_replace('/[^0-9A-Fa-f]/', '', $hex); // converted decimal value: $dec = hexdec($hex); // maximum decimal value based on length of hex + 1: // number of bits in hex number is 8 bits for each 2 hex -> max = 2^n // use 'pow(2,n)' since '1 << n' is only for integers and therefore limited to integer size. $max = pow(2, 4 * (strlen($hex) + (strlen($hex) % 2))); // complement = maximum - converted hex: $_dec = $max - $dec; // if dec value is larger than its complement we have a negative value (first bit is set) return $dec > $_dec ? -$_dec : $dec; } ?> ---- Server IP: 194.153.94.10 Probable Submitter: 77.59.251.170 ---- Manual Page -- http://www.php.net/manual/en/function.hexdec.php Edit -- https://master.php.net/note/edit/97172 Del: integrated -- https://master.php.net/note/delete/97172/integrated Del: useless -- https://master.php.net/note/delete/97172/useless Del: bad code -- https://master.php.net/note/delete/97172/bad+code Del: spam -- https://master.php.net/note/delete/97172/spam Del: non-english -- https://master.php.net/note/delete/97172/non-english Del: in docs -- https://master.php.net/note/delete/97172/in+docs Del: other reasons-- https://master.php.net/note/delete/97172 Reject -- https://master.php.net/note/reject/97172 Search -- https://master.php.net/manage/user-notes.php