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run code in 150+ php & hhvm versions
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<?php for($i1 = 1; $i1 < 4; $i1++) for($i2 = 1; $i2 < 4; $i2++) for($i3 = 1; $i3 < 4; $i3++){$c++;} echo $c;
based on NHikR
Output for 5.0.4 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Undefined variable: c in /in/JMI8A on line 7 27
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: c in /in/JMI8A on line 7 27