Mine

function unfucked_base_convert ($numstring, $frombase, $tobase){	$chars = "0123456789abcdefghijklmnopqrstuvwxyz";	$tostring = substr($chars, 0, $tobase);	$length = strlen($numstring);	$result = '';	for ($i = 0; $i < $length; $i++) {		$number[$i] = strpos($chars, $numstring{$i});	}	do {		$divide = 0;		$newlen = 0;		for ($i = 0; $i < $length; $i++) {			$divide = $divide * $frombase + $number[$i];			if ($divide >= $tobase) {				$number[$newlen++] = (int)($divide / $tobase);				$divide = $divide % $tobase;			} elseif ($newlen > 0) {				$number[$newlen++] = 0;			}		}		$length = $newlen;		$result = $tostring{$divide} . $result;	}	while ($newlen != 0);	return $result;}