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run code in 150+ php & hhvm versions
Bugs & Features
<?php $a=array("red","green","blue","OOR","POP"); array_pop($a); print_r($a); ?>
based on Pcfv6
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Array ( [0] => red [1] => green [2] => blue [3] => OOR )
Output for hhvm-3.10.0

Process exited with code 153.