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<?php $x = array('a'=>1, 'b'=>2); $z = array_filter($x, function(&$val){ $val = $val%2; return $val; }); var_dump($x,$z);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: {closure}(): Argument #1 ($val) must be passed by reference, value given in /in/YMj7P on line 3 Warning: {closure}(): Argument #1 ($val) must be passed by reference, value given in /in/YMj7P on line 3 array(2) { ["a"]=> int(1) ["b"]=> int(2) } array(1) { ["a"]=> int(1) }

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