Solve the problem of errors when PHP connects to Sina Cloud and mySQL database

At the beginning, when I connected to the server, I wrote this.

$link = mysql_connect('w.rdc.sae.sina.com.cn:3307','',''); 

The result is an error: this app is not authorized

It turns out that when connecting to the server, you should connect like this

$link=mysql_connect(SAE_MYSQL_HOST_M.':'.SAE_MYSQL_PORT,SAE_MYSQL_USER,SAE_MYSQL_PASS);
附：
<?php
// 连主库
$link=mysql_connect(SAE_MYSQL_HOST_M.':'.SAE_MYSQL_PORT,SAE_MYSQL_USER,SAE_MYSQL_PASS);

// 连从库
// $link=mysql_connect(SAE_MYSQL_HOST_S.':'.SAE_MYSQL_PORT,SAE_MYSQL_USER,SAE_MYSQL_PASS);

if($link)
{
    mysql_select_db(SAE_MYSQL_DB,$link);
}

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