• PHP MySQL 插入多条数据


    PHP MySQL 插入多条数据


    使用 MySQLi 和 PDO 向 MySQL 插入多条数据

    mysqli_multi_query() 函数可用来执行多条SQL语句。

    以下实例向 "MyGuests" 表添加了三条新的记录:

    实例 (MySQLi - 面向对象)

    <?php
    $servername = "localhost";
    $username = "username";
    $password = "password";
    $dbname = "myDB";

    // 创建链接
    $conn = new mysqli($servername, $username, $password, $dbname);
    // 检查链接
    if ($conn->connect_error) {
        die("Connection failed: " . $conn->connect_error);


    $sql = "INSERT INTO MyGuests (firstname, lastname, email)
    VALUES ('John', 'Doe', 'john@example.com');";
    $sql .= "INSERT INTO MyGuests (firstname, lastname, email)
    VALUES ('Mary', 'Moe', 'mary@example.com');";
    $sql .= "INSERT INTO MyGuests (firstname, lastname, email)
    VALUES ('Julie', 'Dooley', 'julie@example.com')";

    if ($conn->multi_query($sql) === TRUE) {
        echo "New records created successfully";
    } else {
        echo "Error: " . $sql . "<br>" . $conn->error;
    }

    $conn->close();
    ?>
    Note 请注意,每个SQL语句必须用分号隔开。

    实例 (MySQLi - 面向过程)

    <?php
    $servername = "localhost";
    $username = "username";
    $password = "password";
    $dbname = "myDB";

    // 创建链接
    $conn = mysqli_connect($servername, $username, $password, $dbname);
    // 检查链接
    if (!$conn) {
        die("Connection failed: " . mysqli_connect_error());
    }

    $sql = "INSERT INTO MyGuests (firstname, lastname, email)
    VALUES ('John', 'Doe', 'john@example.com');";
    $sql .= "INSERT INTO MyGuests (firstname, lastname, email)
    VALUES ('Mary', 'Moe', 'mary@example.com');";
    $sql .= "INSERT INTO MyGuests (firstname, lastname, email)
    VALUES ('Julie', 'Dooley', 'julie@example.com')";

    if (mysqli_multi_query($conn, $sql)) {
        echo "New records created successfully";
    } else {
        echo "Error: " . $sql . "<br>" . mysqli_error($conn);
    }

    mysqli_close($conn);
    ?>

    实例 (PDO)

    <?php
    $servername = "localhost";
    $username = "username";
    $password = "password";
    $dbname = "myDBPDO";

    try {
        $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
        // set the PDO error mode to exception
        $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

        // 开始事务
        $conn->beginTransaction();
        // SQL 语句
        $conn->exec("INSERT INTO MyGuests (firstname, lastname, email) 
        VALUES ('John', 'Doe', 'john@example.com')");
        $conn->exec("INSERT INTO MyGuests (firstname, lastname, email) 
        VALUES ('Mary', 'Moe', 'mary@example.com')");
        $conn->exec("INSERT INTO MyGuests (firstname, lastname, email) 
        VALUES ('Julie', 'Dooley', 'julie@example.com')");

        // commit the transaction
        $conn->commit();
        echo "New records created successfully";
        }
    catch(PDOException $e)
        {
        // roll back the transaction if something failed
        $conn->rollback();
        echo $sql . "<br>" . $e->getMessage();
        }

    $conn = null;
    ?>

    使用预处理语句

    mysqli 扩展提供了第二种方式用于插入语句。

    我们可以预处理语句及绑定参数。

    mysql 扩展可以不带数据发送语句或查询到mysql数据库。 你可以向列关联或 "绑定" 变量。

    Example (MySQLi 使用预处理语句)

    <?php
    $servername = "localhost";
    $username = "username";
    $password = "password";
    $dbname = "myDB";

    // Create connection
    $conn = new mysqli($servername, $username, $password, $dbname);
    // Check connection
    if ($conn->connect_error) {
        die("Connection failed: " . $conn->connect_error);
    } else {
        $sql = "INSERT INTO MyGuests VALUES(?, ?, ?)";

        // 为 mysqli_stmt_prepare() 初始化 statement 对象
        $stmt = mysqli_stmt_init($conn);

        //预处理语句
        if (mysqli_stmt_prepare($stmt, $sql)) {
            // 绑定参数
            mysqli_stmt_bind_param($stmt, 'sss', $firstname, $lastname, $email);

            // 设置参数并执行
            $firstname = 'John';
            $lastname = 'Doe';
            $email = 'john@example.com';
            mysqli_stmt_execute($stmt);

            $firstname = 'Mary';
            $lastname = 'Moe';
            $email = 'mary@example.com';
            mysqli_stmt_execute($stmt);

            $firstname = 'Julie';
            $lastname = 'Dooley';
            $email = 'julie@example.com';
            mysqli_stmt_execute($stmt);
        }
    }
    ?>

    我们可以看到以上实例中使用模块化来处理问题。我们可以通过创建代码块实现更简单的读取和管理。

    注意参数的绑定。让我们看下 mysqli_stmt_bind_param() 中的代码:

    mysqli_stmt_bind_param($stmt, 'sss', $firstname, $lastname, $email);

    该函数绑定参数查询并将参数传递给数据库。第二个参数是 "sss" 。以下列表展示了参数的类型。 s 字符告诉 mysql 参数是字符串。

    This argument may be one of four types:

    • i - integer
    • d - double
    • s - string
    • b - BLOB

    每个参数必须指定类型,来保证数据的安全性。通过类型的判断可以减少SQL注入漏洞带来的风险。

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  • 原文地址:https://www.cnblogs.com/aiqingqing/p/4541385.html
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