Uploadify：显示PHP错误

Question

How can I send errors caused in back-end PHP file of Uploadify to the uploading form? Right now when I have an error to report to the user from PHP I just echo and it goes to the onComplete method of Uploadify and alerts the user. Please see below:

<?php
if (!empty($_FILES)) {
    $tempFile = $_FILES['Filedata']['tmp_name'];
    $targetPath = $_SERVER['DOCUMENT_ROOT'] . $_GET['folder'] . '/';
    $targetFile =  str_replace('//','/',$targetPath) . $_FILES['Filedata']['name'];
    move_uploaded_file($tempFile,$targetFile);
}

if ($error) // I want to show this error on uploading form page.
    {
    echo "Some error";
    } 
else
    {   
    echo '1';
    }
?>

and I get the error like:

'onComplete': function(a, b, c, data, e){
                                alert(data); 
            }

1. The problem is that I want to get Only error, but it will print "1" if there is no error. I want to print only if there is any error, otherwise dont print 1.
2. How can i append the error data on the page instead of alert?

Thanks

Answer 1

Have PHP echo 1 if success and an error message if not. Then just check the response back is 1 or something else.

'onComplete': function(a, b, c, data, e){
  if (data == '1') {
      alert('ok!');
   }
   else {
      alert('Error: ' + data);
   } 
 }