如何使用PHP脚本删除数据表

DROP TABLE table_name ;

mysqli_query(connection,query,resultmode);

<?php
$dbhost = &#39;localhost:3306&#39;;  // mysql服务器主机地址
$dbuser = &#39;root&#39;;            // mysql用户名
$dbpass = &#39;123456&#39;;          // mysql用户名密码
$conn = mysqli_connect($dbhost, $dbuser, $dbpass);
if(! $conn ){  
die(&#39;连接失败: &#39; . mysqli_error($conn));}
echo &#39;连接成功<br />&#39;;
$sql = "DROP TABLE runoob_tbl";
mysqli_select_db( $conn, &#39;RUNOOB&#39; );
$retval = mysqli_query( $conn, $sql );
if(! $retval ){  die(&#39;数据表删除失败: &#39; . mysqli_error($conn));}
echo "数据表删除成功\n";mysqli_close($conn);?>