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<?php $array = [ [11 => 771725], [11 => 847226], [10 => 410035], [11 => 455387], ]; $result = array_fill_keys(range(1,12), 0); foreach ($array as $a) { $result[key($a)] += reset($a); } print_r($result);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [1] => 0 [2] => 0 [3] => 0 [4] => 0 [5] => 0 [6] => 0 [7] => 0 [8] => 0 [9] => 0 [10] => 410035 [11] => 2074338 [12] => 0 )

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