note 108024 added to function.dechex
| From: | sneskid at hotmail dot com | Date: | Fri, 23 Mar 2012 07:09:52 +0000 |
| Subject: | note 108024 added to function.dechex | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-186781@lists.php.net to get a copy of this message | ||
If you want to create or parse signed Hex values:
<?php
// $d should be an int
function sdechex($d) { return ($d<0) ? ('-' . dechex(-$d)) : dechex($d); }
// $h should be a string
function shexdec($h) { return ($h[0] === '-') ? -('0x' . substr($h,1) + 0) :
('0x' . $h + 0); }
// test
$v = sdechex(-123); // string(3) "-7b"
$i = shexdec($v); // int(-123)
var_dump($v, $i);
?>
Also note that ('0x' . $str + 0) is faster than hexdec()
----
Server IP: 69.147.83.197
Probable Submitter: 99.243.44.37
----
Manual Page -- http://www.php.net/manual/en/function.dechex.php
Edit -- https://master.php.net/note/edit/108024
Del: integrated -- https://master.php.net/note/delete/108024/integrated
Del: useless -- https://master.php.net/note/delete/108024/useless
Del: bad code -- https://master.php.net/note/delete/108024/bad+code
Del: spam -- https://master.php.net/note/delete/108024/spam
Del: non-english -- https://master.php.net/note/delete/108024/non-english
Del: in docs -- https://master.php.net/note/delete/108024/in+docs
Del: other reasons-- https://master.php.net/note/delete/108024
Reject -- https://master.php.net/note/reject/108024
Search -- https://master.php.net/manage/user-notes.php