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run code in 200+ php & hhvm versions
Bugs & Features
<?php $arr = [ 1 => 'a', 2 => 'b', 3 => 'c', 4 => 'd' ]; $ids = [1, 3, 4]; var_dump(array_intersect_key($arr, $ids));
Output for 5.4.0 - 7.2.0
array(2) { [1]=> string(1) "a" [2]=> string(1) "b" }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/6LWhA 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/6LWhA on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/6LWhA on line 3
Process exited with code 255.