What are the potential issues or challenges when working with CMS systems that encode forms in "multipart/form-data"?

When working with CMS systems that encode forms in "multipart/form-data", one potential issue is that PHP's $_POST array will not contain the form data. To solve this, you can access the form data using the $_FILES array instead, which is populated with data from forms that use "multipart/form-data" encoding.

// Access form data when using "multipart/form-data" encoding
if ($_SERVER['REQUEST_METHOD'] === 'POST' && !empty($_FILES)) {
    $formData = $_FILES['form_field_name']['tmp_name'];
    
    // Process the form data
}