<?php
$servername = "localhost";
$username = "root";
$password = "admin";
$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: " . $conn->connect_error);
}$sql = "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('John', 'Doe', 'john@example.com')";if ($conn->query($sql) === TRUE) {echo "新记录插入成功";
} else {echo "Error: " . $sql . "<br>" . $conn->error;
}$conn->close();
?>

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";// 创建连接
$conn = mysqli_connect($servername, $username, $password, $dbname);
// 检测连接
if (!$conn) {die("Connection failed: " . mysqli_connect_error());
}$sql = "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('John', 'Doe', 'john@example.com')";if (mysqli_query($conn, $sql)) {echo "新记录插入成功";
} else {echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}mysqli_close($conn);
?>

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDBPDO";try {$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);// 设置 PDO 错误模式，用于抛出异常$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);$sql = "INSERT INTO MyGuests (firstname, lastname, email)VALUES ('John', 'Doe', 'john@example.com')";// 使用 exec() ，没有结果返回 $conn->exec($sql);echo "新记录插入成功";
}
catch(PDOException $e)
{echo $sql . "<br>" . $e->getMessage();
}$conn = null;
?>