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<?php $a = array('1','2','3','4'); $b = array('4','5','6','7'); $c = array_merge($a,$b); var_dump(array_unique($c)); ?>
Output for git.master, git.master_jit, rfc.property-hooks
array(7) { [0]=> string(1) "1" [1]=> string(1) "2" [2]=> string(1) "3" [3]=> string(1) "4" [5]=> string(1) "5" [6]=> string(1) "6" [7]=> string(1) "7" }

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