SQL info: Can not connect to MySQL server

Time: 2019-6-19 3:16am
Script: /article.php

Error: Lost connection to MySQL server at 'reading initial communication packet', system error: 0
Errno.: 2013
File trace:
    1==>E:\freehost\hztmyy\web\class\db_mysql.class.php:17
    2==>E:\freehost\hztmyy\web\include\common.inc.php:70
    3==>E:\freehost\hztmyy\web\article.php:2