PHP MySQL 插入多条数据 - PHP 中级教程

可以向表一次性插入多条数据

使用 INSERT INTO 可以向表中一次性插入多条语句

面向对象 MySQLi

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

// 创建链接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查链接
if ($conn->connect_error)
{
    die("连接失败: " . $conn->connect_error);
}

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


if ($conn->multi_query($sql) === TRUE)
{
    echo "新记录插入成功";
} else
{
    echo "Error: " , $sql , "<br>" , $conn->error;
}

$conn->close();

每个SQL语句必须用分号隔开

面向过程 MySQLi

<?php

$servername = "localhost";
$username   = "root";
$password   = "";
$dbname     = "twle";

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

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

if (mysqli_multi_query($conn, $sql))
{
    echo "新记录插入成功";

} else {

    echo "Error: " . $sql . "<br>" . mysqli_error($conn);

}

mysqli_close($conn);

PDO

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

try {
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);

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

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

    // 提交事务
    $conn->commit();
    echo "新记录插入成功";
}
catch(PDOException $e)
{
    // 如果执行失败回滚
    $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

可以向列关联或 "绑定" 变量

MySQLi 使用预处理语句

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

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);
// 检测连接
if ($conn->connect_error)
{
    die("连接失败: " . $conn->connect_error);

} else {

    $sql = "INSERT INTO customer(firstname, lastname, email)  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，上面的代码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

参数类型	说明
s	字符告诉 mysql 参数是字符串
i	整数
d	双精度浮点数
s	字符串
b	布尔值

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