php执行多条sql语句 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。

php执行多条sql语句 PHP MySQL 插入多条数据