note 86123 added to function.bin2hex

Because the way back (hex2bin) doesn't exist on php, i've written another little function without using commands like pack:

<?php
// Convert a hex-string to binary-string (the way back from bin2hex)

function hex2bin($h)
  {
  if (!is_string($h)) return null;
  $r='';
  for ($a=0; $a<strlen($h); $a+=2) { $r.=chr(hexdec($h{$a}.$h{($a+1)})); }
  return $r;
  }

echo bin2hex('Hello'); // result: 48656c6c6f
echo hex2bin('48656c6c6f'); // result: Hello
?>
----
Server IP: 217.13.201.10
Probable Submitter: 89.56.25.218
----
Manual Page -- http://www.php.net/manual/en/function.bin2hex.php
Edit        -- https://master.php.net/note/edit/86123
Del: integrated  -- https://master.php.net/note/delete/86123/integrated
Del: useless     -- https://master.php.net/note/delete/86123/useless
Del: bad code    -- https://master.php.net/note/delete/86123/bad+code
Del: spam        -- https://master.php.net/note/delete/86123/spam
Del: non-english -- https://master.php.net/note/delete/86123/non-english
Del: in docs     -- https://master.php.net/note/delete/86123/in+docs
Del: other reasons-- https://master.php.net/note/delete/86123
Reject      -- https://master.php.net/note/reject/86123
Search      -- https://master.php.net/manage/user-notes.php