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<?php $a1 = array(1=>1, 2=>2, 3=>3, 4=>4, 5=>5, 6=>6, 7=>7); //refrenced elsewhere $a2 = array(2=>2, 4=>4, 6=>6, 8=>8); //currently exist $a3 = array_diff($a1, $a2); var_dump($a3);
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { [1]=> int(1) [3]=> int(3) [5]=> int(5) [7]=> int(7) }

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