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.

Answer 2

Well, if you want to use exceptions, you could do something like:

function handleUpload() {       $move = move_uploaded_file($_FILES['file']['tmp_name'], $_SERVER['DOCUMENT_ROOT']."/uploads/".$_FILES['file']['name']);      if (!$move) {        throw new Exception('File Didnt Upload');     }  }  try {    handleUpload();    echo "File Uploaded Successfully"; } catch(Exception $ex) {    die($ex->getMessage); } 

I know this may seem like bloat - but you can call the method from anywhere in the call stack, and catch the exception at any point.