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run code in 150+ php & hhvm versions
Bugs & Features
<?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 - 7.1.0
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 - 5.3.3
int(1) int(1) int(1) int(0)
Output for 4.3.0 - 4.4.8, 5.0.0 - 5.2.4
int(1) int(1) int(1) int(1)