3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php for($i=0;$i<5;$i++) { $s .= $a[$i]; }
Output for 5.0.4 - 7.2.0
Notice: Undefined variable: a in /in/97gK6 on line 4 Notice: Undefined variable: s in /in/97gK6 on line 4 Notice: Undefined variable: a in /in/97gK6 on line 4 Notice: Undefined variable: a in /in/97gK6 on line 4 Notice: Undefined variable: a in /in/97gK6 on line 4 Notice: Undefined variable: a in /in/97gK6 on line 4
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: a in /in/97gK6 on line 4 Notice: Undefined variable: s in /in/97gK6 on line 4 Notice: Undefined variable: a in /in/97gK6 on line 4 Notice: Undefined variable: a in /in/97gK6 on line 4 Notice: Undefined variable: a in /in/97gK6 on line 4 Notice: Undefined variable: a in /in/97gK6 on line 4