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<?php $k = $u = ["00068000" => 0, "0006e004" => 0]; ksort($k); uksort($u, 'strcmp'); var_dump($k, $u);
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { ["0006e004"]=> int(0) ["00068000"]=> int(0) } array(2) { ["00068000"]=> int(0) ["0006e004"]=> int(0) }

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