3v4l.org

run code in 300+ PHP versions simultaneously
<?php function compare($left, $right) { if (($length = mb_strlen($left)) != mb_strlen($right)) { return false; } for ($i = 0, $result = 0; $i < $length; $i++) { $result |= ord($left[$i]) ^ ord($right[$i]); } return $result === 0; } var_dump(compare('Ð', 'Â'));
Output for 5.6.0 - 5.6.38, 7.0.0 - 7.0.31, 7.1.0 - 7.1.23, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
bool(true)
Output for 5.5.0 - 5.5.38
bool(false)
preferences:
44.29 ms | 406 KiB | 5 Q