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