PHP删除MySQL数据库下的所有数据表

<?php

//【数据无价，请谨慎操作！】

$hostname ='localhost'; 
$userid = 'username'; 
$password = 'password'; 
$dbname = 'dbname'; 
$connect = mysql_connect($hostname,$userid,$password); 
mysql_select_db($dbname);
$result = mysql_query("show table status from $dbname",$connect); 
while($data=mysql_fetch_array($result)) { 
    mysql_query("drop table $data[Name]"); 
}

?>