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<?php $arr = [ "0" => [ "gift_product" => 6475, ], "1" => [ "gift_product" => 7377, ], "2" => [ "gift_product" => 6367, ], ]; echo implode(",", array_column($arr, "gift_product"));
Output for git.master, git.master_jit, rfc.property-hooks
6475,7377,6367

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