php实现自动编号

CREATE TABLE users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    email VARCHAR(100) NOT NULL UNIQUE
);

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 插入数据
$sql = "INSERT INTO users (name, email) VALUES ('John Doe', 'john@example.com')";

if ($conn->query($sql) === TRUE) {
    echo "新记录插入成功，自动编号为: " . $conn->insert_id;
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

$conn->close();
?>

if ($conn->query($sql) === TRUE) {
    echo "新记录插入成功，自动编号为: " . $conn->insert_id;
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

START TRANSACTION;
INSERT INTO users (name, email) VALUES ('John Doe', 'john@example.com');
COMMIT;