Question

The ‘unlink()’ method is executed even though no images have been uploaded, why is this and how can I fix it?

If (isset($_FILES["image"]["name"])) {
    move_uploaded_file($_FILES["imageUp"]["tmp_name"],
        "C:/xampp/htdocs/" . $_FILES["image"]["name"]);
    //if (file_exists($delete)) {
        unlink($delete);
    }
    else {
    $img = $data['row']->image_name;
    }
//}

Answer 1

isset($_FILES["image"]["name"] 

will always be set even if you upload a file or not. isset checks whether the thing is set or not. So it will always be true.

So you need to change your code :

if (isset($_FILES["image"]["name"]) && !empty($_FILES["image"]["name"])) {
move_uploaded_file($_FILES["imageUp"]["tmp_name"],
    "C:/xampp/htdocs/" . $_FILES["image"]["name"]);
//if (file_exists($delete)) {
    unlink($delete);
} else {
    $img = $data['row']->image_name;
}

Please try with this. Hope this helps 🙂