- urldecode: documentation ( source)
- mb_strtolower: documentation ( source)
- sprintf: documentation ( source)
<?php
for($i = 0; $i < 256; ++$i){
for($k = 0; $k < 256; ++$k){
$z = sprintf("%%%08x%%08x", $i, $k);
echo $z;
$x = mb_strtolower(urldecode($z));
if($x=="'"){
echo $z."\n";
}
}
}