Convert to HEX

bubblenut

Hi, I need to convert a chunk of text to hex (similar to rawurlencode but for every character) and was just wondering if there's an easy way of doing this.
Thanks
Bubble

dalecosp

Would some combination of [man]pack/man and [man]bin2hex/man help you?

Or this, perhaps, followed by bin2hex().

function asc2bin ($ascii)
{
  while ( strlen($ascii) > 0 )
  {
    $byte = ""; $i = 0;
    $byte = substr($ascii, 0, 1);
    while ( $byte != chr($i) ) { $i++; }
    $byte = base_convert($i, 10, 2);
    $byte = str_repeat("0", (8 - strlen($byte)) ) . $byte; # This is an endian (architexture) specific line, you may need to alter it.
    $ascii = substr($ascii, 1);
    $binary = "$binary$byte";
  }
  return $binary;
}

... from the manual notes...

Weedpacket

$string=preg_replace('/./se',
"sprintf('%02x',ord('$0'))",
$string);

Moonglobe

that's a lot easier than mine:

$letters = preg_split('//',$_POST['txt'],-1,PREG_SPLIT_NO_EMPTY);
$out = array();
foreach ($letters as $k=>$letter)
{
    $out[$k] = '%'.dechex(ord($letter));
}
echo implode('',$out);

:rolleyes:

bubblenut

Thanks that's brilliant.
weed, how does your's actually work? I can't for the life of me figure it out 😕
Thanks
Bubble

Moonglobe

the 'e' operator of preg_replace makes php eval()uate what's in the replace string as php.

bubblenut

Ahaaaaa! I see, cunning.

dalecosp

Originally posted by bubblenut
Ahaaaaa! I see, cunning.

That's Mr. Weedpacket for ya .... 😉