note 90408 added to function.bin2hex
| From: | gimpstraw at gmail dot com | Date: | Tue, 21 Apr 2009 06:01:15 +0000 |
| Subject: | note 90408 added to function.bin2hex | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-153532@lists.php.net to get a copy of this message | ||
I want clear this up for everyone using functions like the one below this...
<?php
function bin2hex($str) {
$hex = "";
$i = 0;
do {
$hex .= dechex(ord($str{$i}));
$i++;
} while ($i < strlen($str));
return $hex;
}
// Look what happens when ord($str{$i}) is 0...15
// you get a single digit hexadecimal value 0...F
// bin2hex($str) could return something like 4a3,
// decimals(74, 3), whatever the binary value is of those.
function hex2bin($str) {
$bin = "";
$i = 0;
do {
$bin .= chr(hexdec($str{$i}.$str{($i + 1)}));
$i += 2;
} while ($i < strlen($str));
return $bin;
}
// hex2bin("4a3") just broke. Now what?
// Using sprintf() to get it right.
function bin2hex($str) {
$hex = "";
$i = 0;
do {
$hex .= sprintf("%02x", ord($str{$i}));
$i++;
} while ($i < strlen($str));
return $hex;
}
// now using whatever the binary value of decimals(74, 3)
// and this bin2hex() you get a hexadecimal value you can
// then run the hex2bin function on. 4a03 instead of 4a3.
?>
----
Server IP: 69.147.83.197
Probable Submitter: 71.211.194.247
----
Manual Page -- http://www.php.net/manual/en/function.bin2hex.php
Edit -- https://master.php.net/note/edit/90408
Del: integrated -- https://master.php.net/note/delete/90408/integrated
Del: useless -- https://master.php.net/note/delete/90408/useless
Del: bad code -- https://master.php.net/note/delete/90408/bad+code
Del: spam -- https://master.php.net/note/delete/90408/spam
Del: non-english -- https://master.php.net/note/delete/90408/non-english
Del: in docs -- https://master.php.net/note/delete/90408/in+docs
Del: other reasons-- https://master.php.net/note/delete/90408
Reject -- https://master.php.net/note/reject/90408
Search -- https://master.php.net/manage/user-notes.php