PHP MySQL 插入多条数据

一般情况下，INSERT 语句只能向 MySQL 数据库添加一条语句，而本文将介绍如何使用函数批量的向数据表插入多条数据。

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 . "

" . $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";

// 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 . "

" . 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 . "

" . $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 (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 - 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。