How can the interaction between GET parameters and POST data affect file uploads in PHP forms, and how can this issue be resolved?

When using both GET parameters and POST data in a PHP form, the file upload may not work properly because the file data is sent through POST while the GET parameters are sent through the URL. To resolve this issue, you can either use POST for all form data including the parameters that were previously sent through GET, or you can combine the GET parameters with the form data before submitting the form. 

// Combine GET parameters with form data before submitting the form
<form action="upload.php?param1=value1&param2=value2" method="post" enctype="multipart/form-data">
    <input type="text" name="text_data">
    <input type="file" name="file_data">
    <input type="submit" value="Submit">
</form>

Keywords

GET parameters POST data file uploads PHP forms resolution

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