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<?php $a = ['a', 2 => 'c']; var_dump(array_merge($a, ['d', 'e']));
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { [0]=> string(1) "a" [1]=> string(1) "c" [2]=> string(1) "d" [3]=> string(1) "e" }

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