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";
$conn = new mysqli($servername, $username, $password, $dbname);if ($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;}
$conn->close();?>
 | 请注意，每个SQL语句必须用分号隔开。 |
|---|
实例 (MySQLi - 面向过程)
<?php$servername = "localhost";$username = "username";$password = "password";$dbname = "myDB";
$conn = mysqli_connect($servername, $username, $password, $dbname);if (!$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);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$conn->beginTransaction();
$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')");
$conn->commit(); echo "新记录插入成功";}catch(PDOException $e){
$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";
$conn = new mysqli($servername, $username, $password, $dbname);if ($conn->connect_error) {
die("连接失败: " . $conn->connect_error);} else {
$sql = "INSERT INTO MyGuests(firstname, lastname, email) VALUES(?, ?, ?)";
$stmt = mysqli_stmt_init($conn);
if (mysqli_stmt_prepare($stmt, $sql)) {
mysqli_stmt_bind_param($stmt, 'sss', $firstname, $lastname, $email);
$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。
