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run code in 150+ php & hhvm versions
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<?php $a=$_GET['fuck']; $b=$_GET['you']; if(is_string($a)) echo " $a good 1"; else if(is_string($b)) echo "this $b 2"; else echo "$a $b 3"; ?>
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Undefined index: fuck in /in/1RRmc on line 2 Notice: Undefined index: you in /in/1RRmc on line 3 3
Output for 4.3.0 - 5.2.17
Notice: Undefined index: fuck in /in/1RRmc on line 2 Notice: Undefined index: you in /in/1RRmc on line 3 3