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<?php $some_array = array (0 => 1, 'x'=> 1, 2 => 1, 'a'=> 1, 1 => 1, 'z'=> 1); ksort($some_array); echo(join("", array_keys($some_array)));
Output for git.master, git.master_jit, rfc.property-hooks
012axz

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