What potential issues could arise if multiple users upload files with the same order number in a PHP application?

If multiple users upload files with the same order number in a PHP application, it could lead to data overwriting or confusion when retrieving the files. To solve this issue, you can append a unique identifier to the file name before saving it to ensure each file has a distinct name. 

// Generate a unique identifier
$unique_id = uniqid();

// Append the unique identifier to the file name
$file_name = $order_number . '_' . $unique_id . '_' . $_FILES['file']['name'];

// Save the file with the unique name
move_uploaded_file($_FILES['file']['tmp_name'], 'uploads/' . $file_name);

Keywords

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