wordpress数据库操作

// 示例代码：连接数据库
$host = 'localhost';
$user = 'your_username';
$password = 'your_password';
$dbname = 'your_database_name';

$conn = new mysqli($host, $user, $password, $dbname);

if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
} else {
    echo "连接成功";
}

// 示例代码：查询数据
$sql = "SELECT * FROM your_table_name WHERE id = 1";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo "ID: " . $row["id"]. " - Name: " . $row["name"]. "<br>";
    }
} else {
    echo "0 结果";
}

// 示例代码：插入数据
$sql = "INSERT INTO your_table_name (name, 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;
}