3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo sprintf("%x",getCrc16("\x08\x02\x00\x00\x01\x43\xEF\x3A", 0, 0xA001, 0)); function getCrc16($buffer, $offset, $polynom, $preset) { $preset &= 0xFFFF; $polynom &= 0xFFFF; $bufLen = strlen($buffer); $crc = $preset; for($i = 0; $i < $bufLen; $i++) { $data = ord($buffer[($i + $offset)%$bufLen]); $crc ^= $data; for ($j = 0; $j < 8; $j++) { if (($crc & 0x0001) != 0) { $crc = ($crc >> 1) ^ $polynom; } else { $crc = $crc >> 1; } } } return $crc & 0xFFFF; }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
6d1e
preferences:
308.94 ms | 405 KiB | 452 Q