How to connect a PHP login page with a database?

2 years ago
Olivia Parker
1 minute

To connect to the database, you can use either the MySQLi or PDO extension in PHP.

An example using the MySQLi extension:

<?php
// 数据库连接参数
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";

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

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

// 执行数据库操作
// ...

// 关闭连接
$conn->close();
?>

Example of using PDO extension:

<?php
// 数据库连接参数
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";

try {
    // 创建连接
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
    // 设置PDO错误模式为异常
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "连接成功";
} catch(PDOException $e) {
    echo "连接失败: " . $e->getMessage();
}

// 执行数据库操作
// ...

// 关闭连接
$conn = null;
?>

In the code above, you need to replace your_username, your_password, and your_database with your actual database connection parameters.

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