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<?php $a1 = array( 'one', 'two', 'three', 'four' ); $a2 = array_diff($a1, $a1); $a2[] = 'five'; var_dump($a2);
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { [0]=> string(4) "five" }

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