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run code in 150+ php & hhvm versions
Bugs & Features
<?php $foo = [ 'a' => '1', 'b' => '1', 'c' => '2', ]; $foo2 = array_combine(array_keys($foo), array_keys($foo)); var_dump($foo2); $foo3 = array_map(function($v) { return '#' . $v; }, $foo2); var_dump($foo3); $foo4 = array_combine($foo3, $foo); var_dump($foo4);
based on Ct6ii
Output for 5.4.0 - 7.1.0
array(3) { ["a"]=> string(1) "a" ["b"]=> string(1) "b" ["c"]=> string(1) "c" } array(3) { ["a"]=> string(2) "#a" ["b"]=> string(2) "#b" ["c"]=> string(2) "#c" } array(3) { ["#a"]=> string(1) "1" ["#b"]=> string(1) "1" ["#c"]=> string(1) "2" }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/tClaN 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 '[' in /in/tClaN on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/tClaN on line 3
Process exited with code 255.