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<?php $array = [ 0 => 'apple', 'b' => 'banana', 3 => 'cow', 'wrench' => 'duck', ]; $filtered = array_filter( $array, function ($k) { return is_numeric($k); }, // test to include only numeric keyed ARRAY_FILTER_USE_KEY // new in PHP 5.6 ); var_dump($filtered);
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [0]=> string(5) "apple" [3]=> string(3) "cow" }

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