3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $input_date = '1912-12-22'; if(!preg_match("[0-9]{4}-(0[1-9]|1[012])-(0[1-9]|1[0-9]|2[0-9]|3[01])",$input_date, $aux_date)) echo 'match';
Output for 4.3.11 - 7.1.0
Warning: preg_match(): Unknown modifier '{' in /in/nkWjN on line 3 match
Output for 4.3.0 - 4.3.10
Warning: Unknown modifier '{' in /in/nkWjN on line 3 match