MySQL server error report:Array ( [0] => Array ( [message] => MySQL Query Error ) [1] => Array ( [sql] => SELECT CONCAT(LEFT(u.user_name,length(u.user_name)-3),"***") as user_name , og.goods_number, oi.add_time, IF(oi.order_status IN (2, 3, 4), 0, 1) AS order_status FROM `chundaoadmin`.`cd_order_info` AS oi LEFT JOIN `chundaoadmin`.`cd_users` AS u ON oi.user_id = u.user_id, `chundaoadmin`.`cd_order_goods` AS og WHERE oi.order_id = og.order_id AND 1643440305 - oi.add_time < 2592000 AND og.goods_id = 2746 and oi.pay_status=2 ORDER BY oi.add_time DESC LIMIT 5 ) [2] => Array ( [error] => MySQL server has gone away ) [3] => Array ( [errno] => 2006 ) ) MySQL server error report:Array ( [0] => Array ( [message] => MySQL Query Error ) [1] => Array ( [sql] => SELECT CONCAT(LEFT(u.user_name,length(u.user_name)-3),"***") as user_name , og.goods_number, oi.add_time, IF(oi.order_status IN (2, 3, 4), 0, 1) AS order_status FROM `chundaoadmin`.`cd_order_info` AS oi LEFT JOIN `chundaoadmin`.`cd_users` AS u ON oi.user_id = u.user_id, `chundaoadmin`.`cd_order_goods` AS og WHERE oi.order_id = og.order_id AND 1643440305 - oi.add_time < 2592000 AND og.goods_id = 2746 and oi.pay_status=2 ORDER BY oi.add_time DESC LIMIT 5 ) [2] => Array ( [error] => MySQL server has gone away ) [3] => Array ( [errno] => 2006 ) [4] => Array ( [message] => MySQL Query Error ) [5] => Array ( [sql] => UPDATE `chundaoadmin`.`cd_sessions` SET expiry = '1643440306', ip = '107.21.85.250', userid = '0', adminid = '0', user_name='0', user_rank='0', discount='1', email='0', data = 'a:3:{s:7:\"from_ad\";i:0;s:7:\"referer\";s:6:\"本站\";s:10:\"login_fail\";i:0;}' WHERE sesskey = '9b8904db5c778ec47dddfe47de7a34ab' LIMIT 1 ) [6] => Array ( [error] => MySQL server has gone away ) [7] => Array ( [errno] => 2006 ) )