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。