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run code in 150+ php & hhvm versions
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<?php $stack = array("orange", "banana", "apple", "raspberry"); unset($stack[3]); var_dump($stack, count($stack)); $fruit = array_pop($stack); var_dump($stack, $fruit, count($stack)); ?>
based on bO2u8
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
array(3) { [0]=> string(6) "orange" [1]=> string(6) "banana" [2]=> string(5) "apple" } int(3) array(2) { [0]=> string(6) "orange" [1]=> string(6) "banana" } string(5) "apple" int(2)
Output for hhvm-3.10.0

Process exited with code 153.