3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(preg_match("//u", "0xF0A0808B", $matches)); var_dump(preg_match("//u", "𠀋", $matches)); var_dump($matches); var_dump("\xF0A0808B" == "𠀋");
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 - 5.6.26, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.17 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
int(1) int(1) array(1) { [0]=> string(0) "" } bool(false)

preferences:
217.95 ms | 405 KiB | 377 Q