asked on

PHP Recognize File Extension

I have this code that would find the extention and regnizes if the file is an image and then moves the selected file. But, it keeps failing when it tries to move a file. Also, it keeps giving an error about the $file = $_FILES['myFileUpload']; on line 4 that is not defined!!!
Please Help!!!!

Paul

<?php

$message = "";
$file = $_FILES['myFileUpload'];
$file_name = $file['name'];
$error = ''; // Empty
$ext = strtolower(substr(strrchr($file_name, "."), 1));
if(isset($_POST['postBack']))

{

      if($_FILES['myFileUpload']['error'] > 0)
      {
            $message = "An error occurred $_FILES[myFileUplaod]";
      }
      else
      {

            $newfile = './uploads/' . $_FILES['myFileUpload']['name'];


            if($ext == 'jpg' || $ext == 'gif' || $ext == 'png')
            {

                  if(is_uploaded_file($_FILES['myFileUpload']['tmp_name']))
                  {

                        if(move_uploaded_file($_FILES['myFileUpload']['tmp_name'],$newfile))
                        {

                              $message = "File $_FILES[myFileUpload][name] uploaded successfully";
                        }
                        else
                        {
                              $message = "File move failed";
                        }
                  }
                  else
                  {
                        $message = "Is_Uploaded_File returned false";
                  }
            }
            else
            {
                  $message = "Invalid file type";
            }
      }
}
?>
<html>
<head>
      <title>Uploading files</title>
</head>
<body>
<form method="post" enctype="multipart/form-data" action="<?php echo $_SERVER['PHP_SELF']; ?>">
      <input name="myFileUpload" type="file">
      <input name="postBack" type="hidden" value="yes"><br/>
      <input type="submit" value="Upload" />
</form>
<?php
echo "<h2>$message</h2>";
?>
</body>
</html>