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run code in 150+ php & hhvm versions
Bugs & Features
<?php //digitalgn_2000_ad_winter_special_2014 preg_match( '/[0-9]+$/', $filename, $matches ); var_dump($matches);
Output for 5.0.4 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Notice: Undefined variable: filename in /in/tDOF2 on line 3 array(0) { }
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: filename in /in/tDOF2 on line 3 array(0) { }