What are the potential drawbacks of allowing users to upload images to a website without size restrictions?

Allowing users to upload images without size restrictions can lead to several issues such as consuming excessive server storage, slowing down website loading times, and potentially compromising website security by allowing malicious files to be uploaded. To solve this issue, it is recommended to implement server-side validation to check the file size before allowing the upload.

// Check if the uploaded file exceeds a certain size limit (e.g. 5MB)
$maxFileSize = 5 * 1024 * 1024; // 5MB in bytes

if ($_FILES['file']['size'] > $maxFileSize) {
    // File size exceeds limit, display an error message
    echo "Error: File size exceeds limit of 5MB.";
} else {
    // Proceed with the file upload process
    // Your upload code here
}