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<?php $a1 = array( 'one', 'two', 'three', 'four' ); $a2 = array_diff( $a1, array( 'one', 'two', 'three', 'four' ) ); $a3 = $a2; $a3[] = 'five'; print_r($a3);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => five )

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