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<?php $extra = array('adgroup', 'campaign', 'content', 'source', 'term', 'mobile', 'tablet'); print_r(array_merge($extra, $extra));
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => adgroup [1] => campaign [2] => content [3] => source [4] => term [5] => mobile [6] => tablet [7] => adgroup [8] => campaign [9] => content [10] => source [11] => term [12] => mobile [13] => tablet )

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