3v4l.org

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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 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
6475,7377,6367

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161.5 ms | 407 KiB | 5 Q