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<?php $from = array('en', 'fr'); $new = array('en', 'cn'); var_dump(array_diff($from, $new), array_intersect($from, $new), array_diff($new, $from));
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { [1]=> string(2) "fr" } array(1) { [0]=> string(2) "en" } array(1) { [1]=> string(2) "cn" }

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