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run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = "72"; if ( is_array($a) && array_key_exists('ErrorTable', $a) ) { echo 'YES'; } else { echo 'NO'; }
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.11.1, hhvm-3.13.2 - 3.17.3, 7.0.0 - 7.2.0
NO
Output for hhvm-3.12.14

Process exited with code 137.