PDO方法操作数据库

一、创建数据库

create table user(

id int unsigned auto_increment,

username varchar(30) nor null,

password varchar(30) nor null,

primary key(id));

二、PDO方法的使用

////连接数据库
//$pdo=new PDO('mysql:host=localhost;dbname=test','root','123456');
////var_dump($pdo);
//
//$sql='select * from user1';
//$smt=$pdo->query($sql);
////返回关联数组
//$rows=$smt->fetchAll(PDO::FETCH_ASSOC );
////返回索引数据
////$rows=$smt->fetchAll(PDO::FETCH_NUM );
////返回混合数组
////$rows=$smt->fetchAll(PDO::FETCH_BOTH );
////返回对象
////$rows=$smt->fetchAll(PDO::FETCH_OBJ );
//
//echo '<pre>';
//print_r($rows);
//echo '</pre>';

三、通过PDO方法操作数据库

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <link rel="stylesheet" href="bs/css/bootstrap.min.css">
    <script src="bs/js/jquery.min.js"></script>
    <script src="bs/js/bootstrap.min.js"></script>
    <title>Document</title>
</head>
<body>
    <div class="container">
        <h1 class="page-header">查看用户</h1>
        <table class="table table-bordered table-striped">
            <tr>
                <th>编号</th>
                <th>用户名</th>
                <th>密码</th>
            </tr>
            <?php
            //连接数据库
            $pdo=new PDO('mysql:host=localhost;dbname=test','root','123456');
            //var_dump($pdo);

            $sql='select * from user1';
            $smt=$pdo->query($sql);
            //返回关联数组
            $rows=$smt->fetchAll(PDO::FETCH_ASSOC );
            print_r($rows);

            foreach ($rows as $row){
                echo "<tr>";
                echo "<td>{$row['id']}</td>";
                echo "<td>{$row['username']}</td>";
                echo "<td>{$row['password']}</td>";
                echo "</tr>";
            }
//            ?>
        </table>
    </div>
</body>
</html>

四、页面展示

PDO方法操作数据库

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