What potential pitfalls can arise when mixing GET and POST methods in PHP forms, and how can they be avoided?

Mixing GET and POST methods in PHP forms can lead to confusion and potential security vulnerabilities. To avoid this, it is recommended to use only one method consistently throughout the form. If both methods are necessary, clearly separate their usage by assigning different functionalities to each method. 

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Handle form submission using POST method
    // Example: process form data, save to database
} elseif ($_SERVER["REQUEST_METHOD"] == "GET") {
    // Handle form submission using GET method
    // Example: display form, retrieve data from database
}

Keywords

GET POST PHP forms CSRF security

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