php 连接 mysql 代码

   (1)$username='root';

        $userpass='123';

        $dbhost='127.0.0.1'; //不能加3306

        $dbdatabase='subscribe';

        $dsn='mysql:host='.$dbhost.';dbname='.$dbdatabase.';';

        $dbh=new PDO($dsn,$username,$userpass);

        $dbh->query('set names utf8;');

        // $sql = "insert into subscribe values(2,'123456','7','1','453566')";

        // $dbh -> exec($sql);

        $stmt = $dbh->prepare("SELECT * FROM subscribe");

        $stmt->execute();

        $allrows = $stmt->fetchAll(PDO::FETCH_ASSOC);       //以关联下标从结果集中获取所有数据

        print_r($allrows);

   (2)$dbhost = "127.0.0.1:3306";

        $username = 'root';

        $userpass = '123';

        $dbdatabase = 'subscribe';

        $db_connect= mysql_connect($dbhost,$username,$userpass) or die("Unable to connect to the MySQL!");

        mysql_select_db($dbdatabase,$db_connect);

        $result=mysql_query("SELECT * FROM subscribe");

        $row=mysql_fetch_array($result);

        var_dump($row);exit;