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<?php $array = array('1', '1a', '2a', '3', '4a'); $array2 = array_map(function($val) { return strpos($val, 'a') ? $val : null; }, $array); var_dump(array_filter($array2));
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [1]=> string(2) "1a" [2]=> string(2) "2a" [4]=> string(2) "4a" }

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