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("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: " . $$sql . "<br>" . $$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";
$$dbname = "myDB";
// 创建链接
$$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: " . $$sql . "<br>" . mysqli_error($$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')");
$$conn->exec("INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('Julie', 'Dooley', 'julie@example.com')");
// commit the transaction
$$conn->commit();
echo "New records created successfully";
}
catch(PDOException $$e)
{
// roll back the transaction if something failed
$$conn->rollback();
echo $$sql . "<br>" . $$e->getMessage();
}
$$conn = null;
?>
使用预处理语句
mysqli 扩展提供了第二种方式用于插入语句。
我们可以预处理语句及绑定参数。
mysql 扩展可以不带数据发送语句或查询到mysql数据库。 你可以向列关联或 "绑定" 变量。
Example (MySQLi 使用预处理语句)
<?php
$$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 {
$$sql = "INSERT INTO MyGuests VALUES(?, ?, ?)";
// 为 mysqli_stmt_prepare() 初始化 statement 对象
$$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。
This argument may be one of four types:
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。
