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run code in 200+ php & hhvm versions
Bugs & Features
<?php $isset = 'count'; var_dump($isset(null));
Output for 7.2.0 - 7.3.0rc4
Warning: count(): Parameter must be an array or an object that implements Countable in /in/cbgui on line 5 int(0)
Output for 4.3.0 - 7.1.20
int(0)