What potential pitfalls can arise when using a while loop for multiple file uploads in PHP?

When using a while loop for multiple file uploads in PHP, a potential pitfall is that the loop may continue indefinitely if not properly controlled. To solve this issue, you can set a limit on the number of iterations or use a condition to break out of the loop when all files have been processed. 

$files = $_FILES['file']['name'];
$total_files = count($files);
$counter = 0;

while($counter < $total_files) {
    // Process file upload here
    
    $counter++;
}

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