3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php // This is valid, both opening ( and closing ) var_dump(preg_match('~Valid(Regular)Expression~', null)); // This is invalid, no opening ( for the closing ) var_dump(preg_match('~InvalidRegular)Expression~', null));
based on lhjZr
Output for 4.3.11 - 5.6.28, 7.0.0 - 7.1.0
int(0) Warning: preg_match(): Compilation failed: unmatched parentheses at offset 14 in /in/k5uMU on line 5 bool(false)
Output for 4.3.0 - 4.3.10, hhvm-3.10.0 - 3.12.0
int(0) Warning: Compilation failed: unmatched parentheses at offset 14 in /in/k5uMU on line 5 bool(false)