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run code in 200+ php & hhvm versions
Bugs & Features
<?php if(!is_null($gay)){ echo 'gay'; }
Output for 5.6.30, hhvm-3.18.5 - 3.21.3, 7.0.30 - 7.3.0alpha1
Notice: Undefined variable: gay in /in/Xc7Es on line 2
Output for hhvm-3.22.0
Notice: Undefined variable: gay in /in/Xc7Es on line -1