What are the differences between using $_REQUEST and $_POST in PHP, and when should each be used?

The main difference between $_REQUEST and $_POST in PHP is that $_REQUEST can retrieve data sent through both GET and POST methods, while $_POST can only retrieve data sent through POST method. It is recommended to use $_POST when you specifically want to retrieve data sent through POST method to ensure security and clarity in your code. 

// Using $_POST to retrieve data sent through POST method
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $username = $_POST["username"];
    $password = $_POST["password"];
    // Process the data accordingly
}

Keywords

$_REQUEST $_POST PHP differences usage

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