3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(preg_match('//u', "\xef\xbf\xbf")); var_dump(preg_match('//u', "\xf4\x8f\xbf\xbf")); var_dump(preg_match('//u', "\xed\x80\x80")); var_dump(preg_match('//u', "\xf4\x90\x80\x80"));
Output for 5.3.4 - 5.3.23, 5.4.0 - 5.4.13, 5.4.41 - 5.4.45, 5.5.10 - 5.5.38, 5.6.0 - 5.6.40, 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 - 8.3.7
int(1) int(1) int(1) bool(false)
Output for 5.3.24 - 5.3.29, 5.4.14 - 5.4.40, 5.5.0 - 5.5.9
bool(false) bool(false) int(1) bool(false)
Output for 4.4.9, 5.2.5 - 5.2.17, 5.3.0 - 5.3.3
int(1) int(1) int(1) int(0)
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.8, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.4
int(1) int(1) int(1) int(1)
preferences:
282.88 ms | 402 KiB | 461 Q