php如何同时连接多个数据库_PHP教程

function mysql_oper($oper,$db,$table,$where='1',$limit='10'){
	 	$conn=mysql_connect('localhost','like','admin',true) or mysql_error();
	 	mysql_select_db($db,$conn);
	 	mysql_query("set names utf8");//必须和表单数据字符保持一致
		if($oper=='select'){
		 	$query="select * from `$table` where ".$where." limit ".$limit;
			$res=mysql_query($query,$conn) or die("获取数据失败");
			$arr=array();
			while($row=mysql_fetch_row($res)){
				$arr[]=$row;
			}
			mysql_close($conn);
			return $arr;
		}
	}