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("连接失败: " . $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 "新记录插入成功";
} 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("连接失败: " . 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 "新记录插入成功";
} 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\')");
 
    // 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。 你可以向列关联或 \”绑定\” 变量。

实例 (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 MyGuests(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。

可以是以下四种参数:

  • 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。