- hex2bin: documentation ( source)
- bin2hex: documentation ( source)
<?php
echo bin2hex('magnet:?xt=urn:btih:49A48ADF414052E4F470A319ED6D200FB4C240B9');
echo "\n";
echo hex2bin('6d61676e65743a3f78743d75726e3a627469683a64393261316231663030336638306463393865663534333438646334626632656638383237313266');