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<?php $arr1 = [1,1,2]; $arr2 = ["abc","def","ghi"]; Foreach($arr1 as $key => $id){ $threads[$id][] = $arr2[$key]; } Var_dump($threads);
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [1]=> array(2) { [0]=> string(3) "abc" [1]=> string(3) "def" } [2]=> array(1) { [0]=> string(3) "ghi" } }

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