MySQL如何删除数据库

<?php

$dbhost = 'localhost';  // mysql服务器主机地址

$dbuser = 'root';            // mysql用户名

$dbpass = '123456';          // mysql用户名密码

$conn = mysqli_connect($dbhost, $dbuser, $dbpass);

if(! $conn )

{

    die('连接失败: ' . mysqli_error($conn));

}

echo '连接成功<br />';

$sql = 'DROP DATABASE RUNOOB';

$retval = mysqli_query( $conn, $sql );

if(! $retval )

{

    die('删除数据库失败: ' . mysqli_error($conn));

}

echo "数据库 RUNOOB 删除成功\n";

mysqli_close($conn);

?>