PHP mysqli_select_db() 函数

实例

更改连接的默认数据库：

 <?php
 $con=mysqli_connect("localhost","my_user","my_password","my_db");
 // Check connection
 if (mysqli_connect_errno($con))
 {
 echo "Failed to connect to MySQL: " . mysqli_connect_error();
 }

// ...some PHP code for database "my_db"...

// Change database to "test"
mysqli_select_db($con,"test");

// ...some PHP code for database "test"...

mysqli_close($con);
 ?>