我的php容器没有连接到我的数据库容器,我遇到了问题。我的码头-Compose.yml : # this is the mysql data volume we are going to hostdocker volume to host the local development database
- dev_mysql_data:/var/lib/mysql<
我是MySQL的初学者。我有这段代码,我想解释一下,既然定义了$conn和$db,函数是如何知道要使用哪个数据库的?$conn = mysql_connect("localhost","primeb5_mysql","***");$query= "SELECT * FROM lesson3";
$result = m