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run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump($timeoutLeft ?: null);
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.8
Notice: Undefined variable: timeoutLeft in /in/VsrjB on line 3 NULL