What are some common pitfalls when trying to process POST requests in PHP for AJAX uploads?

One common pitfall when processing POST requests in PHP for AJAX uploads is not properly handling file uploads. To solve this, make sure to set the enctype attribute of the form to "multipart/form-data" and use the $_FILES superglobal to access the uploaded file data. 

<form id="uploadForm" enctype="multipart/form-data">
    <input type="file" name="file">
    <button type="submit">Upload</button>
</form>

<?php
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    if (isset($_FILES['file'])) {
        $file = $_FILES['file'];
        $fileName = $file['name'];
        $fileTmpName = $file['tmp_name'];
        $fileSize = $file['size'];
        $fileError = $file['error'];
        $fileType = $file['type'];
        
        // Process the uploaded file here
    }
}
?>

Keywords

PHP POST requests AJAX uploads error handling

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