lainchan/inc/polyfill.php

29 lines
490 B
PHP

<?php
// PHP 5.4
if (!function_exists('hex2bin')) {
function hex2bin($data) {
return pack("H*" , $hex_string);
}
}
// PHP 5.6
if (!function_exists('hash_equals')) {
function hash_equals($ours, $theirs) {
$ours = (string)$ours;
$theirs = (string)$theirs;
$tlen = strlen($theirs);
$olen = strlen($ours);
$answer = 0;
for ($i = 0; $i < $tlen; $i++) {
$answer |= ord($ours[$olen > $i ? $i : 0]) ^ ord($theirs[$i]);
}
return $answer === 0 && $olen === $tlen;
}
}