private static function hash_equals($expected, $actual) {

        $expected = (string) $expected;
        $actual   = (string) $actual;
        
        if(true === function_exists('hash_equals')) {
            return hash_equals($expected, $actual);
        }

        $lenExpected  = mb_strlen($expected, self :: ENCODING);
        $lenActual    = mb_strlen($actual, self :: ENCODING);
        $len          = min($lenExpected, $lenActual);
        $result       = 0;
        
        for ($i = 0; $i < $len; $i++) {
            $result |= ord($expected[$i]) ^ ord($actual[$i]);
        }

        $result |= $lenExpected ^ $lenActual;

        return ($result === 0);
    }
private static function hash_equals($expected, $actual) {

        $expected = (string) $expected;
        $actual   = (string) $actual;
        
        if(true === function_exists('hash_equals')) {
            return hash_equals($expected, $actual);
        }

        $lenExpected  = mb_strlen($expected, self :: ENCODING);
        $lenActual    = mb_strlen($actual, self :: ENCODING);
        $len          = min($lenExpected, $lenActual);
        $result       = 0;
        
        for ($i = 0; $i < $len; $i++) {
            $result |= ord($expected[$i]) ^ ord($actual[$i]);
        }

        $result |= $lenExpected ^ $lenActual;

        return ($result === 0);
    }
private static function hash_equals ( $ expected , $ actual ) { $ expected = ( string ) $ expected ; $ actual = ( string ) $ actual ; if ( true === function_exists ( 'hash_equals' ) ) { return hash_equals ( $ expected , $ actual ) ; } $ lenExpected = mb_strlen ( $ expected , self :: ENCODING ) ; $ lenActual = mb_strlen ( $ actual , self :: ENCODING ) ; $ len = min ( $ lenExpected , $ lenActual ) ; $ result = 0 ; for ( $ i = 0 ; $ i < $ len ; $ i ++ ) { $ result |= ord ( $ expected [ $ i ] ) ^ ord ( $ actual [ $ i ] ) ; } $ result |= $ lenExpected ^ $ lenActual ; return ( $ result === 0 ) ; }
Hash equals function for PHP 5.5+
@param string $expected
@param string $actual
@return bool
Hash equals function for PHP 5 . 5 +