php二維數組根據某個字段排序的排序(商品按銷量或其餘字段排序)

// 鏈接數據庫 require './includes/connect.class.php'; $conn = Connect::getInstance(); // 獲取數據 $res = $conn->fetchAll("SELECT * FROM `b_sale` UNION ALL SELECT * FROM `b_lend` "); if (isset($_GET[
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