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run code in 150+ php & hhvm versions
Bugs & Features
<?php $mapped = array_map(function ($x) { return $x*$x; }, range(90, 100)); var_dump($mapped);
Output for 5.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
array(11) { [0]=> int(8100) [1]=> int(8281) [2]=> int(8464) [3]=> int(8649) [4]=> int(8836) [5]=> int(9025) [6]=> int(9216) [7]=> int(9409) [8]=> int(9604) [9]=> int(9801) [10]=> int(10000) }
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in /in/oCHTG on line 3
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 T_FUNCTION, expecting ')' in /in/oCHTG on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/oCHTG on line 3
Process exited with code 255.