3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(preg_match('/(?Cfoo)/', "/"));
based on UFt4j
Output for 4.3.11 - 7.1.0
Warning: preg_match(): Compilation failed: closing ) for (?C expected at offset 3 in /in/VV8ib on line 2 bool(false)
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: closing ) for (?C expected at offset 3 in /in/VV8ib on line 2 bool(false)