批量操作数据库表

<?php
	mysql_connect(&#39;localhost&#39;,&#39;root&#39;,&#39;123456&#39;); 
	mysql_select_db(&#39;china&#39;);  
        $rs=mysql_query(&#39;show tables&#39;); 


	while($arr=mysql_fetch_array($rs)){     
		$tf=strpos($arr[0],&#39;main_&#39;);  
		$newt=explode(&#39;main_&#39;,$arr[0]);
		
		if($tf===0){    
			//修改表名
			$ft=mysql_query("rename table $arr[0] to $newt[1]");     
			
			//删除表
			//$sql = &#39;drop table zt_&#39;.$newt[1];
			//$ft=mysql_query($sql);  

			
			if($ft){           
				echo "$arr[0] 修改成功 $newt[1]
";     
				//echo "$arr[0] 删除成功 $newt[1]
";     				
			}        
		}  

	}