Online PHP editor | refs for 9TR6J

<?php function base64_encode_url($string) { $data = base64_encode($string); return str_replace(['+','/','='], ['-','_',''], $data); } function base64_decode_url($string) { $data = str_replace(['-','_'], ['+','/'], $string); $mod4 = strlen($data) % 4; return base64_decode($data /*. substr('====', $mod4)*/); } for ($i=0; $i<20000; $i++) { $data = random_bytes(rand(12,20)); if (base64_decode_url(base64_encode($data)) !== $data) { echo "FAIL"; } } echo "OK";