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<?php $array = [ '7' => '15', '20' => '6', '11' => '9', '14' => '6', '4' => '15' ]; $result = []; foreach ($array as $key => $value) { $result[$value] = ($result[$value] ?? 0) + $key; } var_export($result);
Output for git.master, git.master_jit, rfc.property-hooks
array ( 15 => 11, 6 => 34, 9 => 11, )

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