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<?php $array = array('1', '1a', '2a', '3', '4a'); $array2 = array_map($array, function($val) { return strpos($val, 'a') ? $val : null; }); var_dump($array2);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: array_map(): Argument #1 ($callback) must be a valid callback or null, array callback must have exactly two members in /in/PBo2S:5 Stack trace: #0 /in/PBo2S(5): array_map(Array, Object(Closure)) #1 {main} thrown in /in/PBo2S on line 5
Process exited with code 255.

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