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<?php $array1 = array("a" => "green", "b" => "brown", "c" => "blue"); $array2 = array("a" => "green", "c" => "blue2", "d" => "cyan"); $result = array_diff_keys($array1, $array2); print_r($result);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Call to undefined function array_diff_keys() in /in/fLv4I:4 Stack trace: #0 {main} thrown in /in/fLv4I on line 4
Process exited with code 255.

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