exception - try catch statement in PHP where the file does not upload

Question

I understand what try-catch statements do, but from reading the documentation on php.net, I would not be able to implement one into my own code. I need a real example to help me understand.

How can I turn this example into a try-catch statement, if the upload was not successful?

$move = move_uploaded_file($_FILES['file']['tmp_name'], $_SERVER['DOCUMENT_ROOT'].'/uploads/'.$_FILES['file']['name']);

if (!$move) {
    die ('File didn't upload');
} else {            
    //opens the uploaded file for extraction
    echo 'Upload Complete!';
}

This may not be a good example to work with, but any help would be appreciated.

Answer 1

You could do it like this.

try {
    //throw exception if can't move the file
    if (!move_uploaded_file( ... )) {
        throw new Exception('Could not move file');
    }

    //do some more things with the file which may also throw an exception
    //...

    //ok if got here
    echo "Upload Complete!";
} catch (Exception $e) {
    die ('File did not upload: ' . $e->getMessage());
}

It is a bit pointless for the above example, but you should get the idea. Note that you can throw the exception(s) from anywhere (e.g. within a function/method that you call from withing the try{}) and they will propagate upwards.