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("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;}
- $conn->close();?>
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实例 (MySQLi - 面向过程)- <?php$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("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($conn);?>
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实例 (PDO)- <?php$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')");
- // 提交事务
- $conn->commit(); echo "新记录插入成功";}catch(PDOException $e){
- // 如果执行失败回滚
- $conn->rollback(); echo $sql . "<br>" . $e->getMessage();}
- $conn = null;?>
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使用预处理语句mysqli 扩展提供了第二种方式用于插入语句。 我们可以预处理语句及绑定参数。 mysql 扩展可以不带数据发送语句或查询到mysql数据库。 你可以向列关联或 "绑定" 变量。 实例 (MySQLi 使用预处理语句)- <?php$servername = "localhost";$username = "username";$password = "password";$dbname =
- "myDB";
- // 创建连接$conn = new mysqli($servername, $username, $password, $dbname);//
- 检测连接if ($conn->connect_error) {
- die("连接失败: " . $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); }}?>
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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);
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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。
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