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<?php $a[] = 'd'; $a['d'][] = 4; $a['d'][] = 6; var_dump($a);
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [0]=> string(1) "d" ["d"]=> array(2) { [0]=> int(4) [1]=> int(6) } }

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