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<?php $array = [ "list" => [ [ "id" => 1, "card_id" => 6, "amount" => 400, ], [ "id" => 2, "card_id" => 3, "amount" => 500, ] ] ]; echo array_sum(array_column($array["list"], 'amount'));
Output for git.master, git.master_jit, rfc.property-hooks
900

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