PHP POST vs GET: Methods Explained

In PHP, $_POST and $_GET are variables used to retrieve data sent to the server via POST and GET methods.

$_POST is used to retrieve data sent to the server through the POST method, such as data submitted through a form using the POST method.

$_GET is used to retrieve data passed to the server through the GET method, such as when passing parameters through a URL.

Example code:

// 通过POST方法获取数据
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $username = $_POST['username'];
    $password = $_POST['password'];
    // 处理表单数据
}

// 通过GET方法获取数据
if (isset($_GET['id'])) {
    $id = $_GET['id'];
    // 处理URL参数
}

It is important to note that when passing data using the POST method, the data is sent to the server in the form of a form via an HTTP request. It is recommended to use the POST method when handling sensitive data. On the other hand, when passing data using the GET method, the data is transmitted in the form of URL parameters, which can be seen in the browser address bar. This method is suitable for passing public data.