3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php preg_match_all('/(_[\w]{1})/g', "resource_id_heeelp_lala_klopsiki", $matches); print_r($matches);
Output for 5.2.0 - 7.1.0
Warning: preg_match_all(): Unknown modifier 'g' in /in/kv8Jv on line 2
Output for 4.3.11 - 5.1.6
Warning: preg_match_all(): Unknown modifier 'g' in /in/kv8Jv on line 2 Array ( )
Output for 4.3.0 - 4.3.10
Warning: Unknown modifier 'g' in /in/kv8Jv on line 2 Array ( )