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run code in 150+ php & hhvm versions
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<?php $id="#s#"; $message=""; $rm_trash = preg_replace('#\/\*.*\*\/#U','',$id); var_dump($rm_trash); var_dump(!preg_match('#[^0-9]#',$rm_trash));
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
string(3) "#s#" bool(false)
Output for hhvm-3.10.0

Process exited with code 153.