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<?php $a = array( 0 => "apple", "b" => "banana", 3 => "cow", "wrench" => "duck" ); $b = array_intersect_key($a, array_flip(array_filter(array_keys($a), 'is_string'))); var_dump($b);
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { ["b"]=> string(6) "banana" ["wrench"]=> string(4) "duck" }

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