php使用PDO连接mysql数据库

<?php

$dsn='mysql:host=localhost;dbname=mssc';

$user='root';

$password='';

$status=1;

try {

    $sql='select * from onethink_order where status=:status';

    $dbh=new PDO($dsn,$user,$password);

    $dbh->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);

    $stmt=$dbh->prepare($sql);

    $stmt->bindParam(':status',$status);

    $stmt->execute();

    //返回插入、更新、删除的受影响行数

    // echo $stmt->rowCount();

    //返回最后插入的id

    // echo 'ID of last insert:'.$dbh->lastInsertId();

    while ($row=$stmt->fetch(PDO::FETCH_ASSOC)) {

        echo $row['id']."\t".$row['status'].'</br>';

    }

} catch (PDOException $e) {

    echo 'SQL Query:'.$sql.'</br>';

    echo 'Connection failed:'.$e->getMessage();

}

 ?>