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run code in 150+ php & hhvm versions
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<?php $a = [1, 2, 3]; foreach ($a as &$v) { var_dump($a); var_dump(array_pop($a)); var_dump($a); }
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(3) { [0]=> &int(1) [1]=> int(2) [2]=> int(3) } int(3) array(2) { [0]=> &int(1) [1]=> int(2) } array(2) { [0]=> int(1) [1]=> &int(2) } int(2) array(1) { [0]=> int(1) }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/ZDEm4 on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/ZDEm4 on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/ZDEm4 on line 2
Process exited with code 255.