What are the potential pitfalls of using PHP for displaying file upload progress percentages?

One potential pitfall of using PHP for displaying file upload progress percentages is that PHP does not have built-in support for real-time progress updates. To solve this issue, you can use JavaScript along with PHP to periodically check the progress of the file upload and update the progress bar on the client side. 

<?php
// Check the progress of the file upload
$progress = $_SESSION['upload_progress'] ?? 0;

// Output the progress as JSON
echo json_encode(['progress' => $progress]);
?>

Keywords

PHP file upload progress percentage limitations AJAX

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