Comments on: Oracle LOB Processing

By: maclochlainn

maclochlainn — Sat, 27 Feb 2010 19:56:36 +0000

I’ve updated the code to PHP 5.3 and added all components in drop down text. The zip files aren’t yet updated but when I fix them, I’ll update this comment.

By: Moe

Moe — Fri, 10 Jul 2009 05:16:50 +0000

SWEEEEET!!!!

It is working!!!

Thanks!

By: maclochlainn

maclochlainn — Fri, 10 Jul 2009 05:08:35 +0000

You need to call the URL not a file reference, change it to http://localhost/lob/webcode/UploadItemBlobForm.htm and it should work. When you attempt to open a PHP file with:

It should output what you got. The reason is that the URL (URI) is passed by the Apache server to the Zend Server, which then interprets the PHP. That can’t happen if you attempt to open it as a local file. Also, the code is written to use a POST method. That means you should call the form, which then calls the PHP code through a POST method operation, like:

This should fix the problem. Let’s hope.

By: Moe

Moe — Fri, 10 Jul 2009 04:58:19 +0000

Wow, thanks. Moving the temp directory from being even with the folder containing the php to beneath it helped out. I now see the text after I load the text, and the text file is in the temp folder, but the image is still having trouble. It now displays this:

By: maclochlainn

maclochlainn — Fri, 10 Jul 2009 04:38:53 +0000

If there’s nothing in the temp directory, then the database hasn’t been touched. The process_uploaded_file() function takes the uploaded file and moves it from the temporary cache to the temp directory.

In your environment, this appears to not be working. This happens before any database activity. Is the temp directory a subdirectory of the directory where you’ve placed the PHP code? If not, you’d get this error unless you rewrite the function provided. I did it that way so that it would work on Linux/Unix or Windows systems. Please let me know if I can help more.

  function process_uploaded_file()
  {
    // Declare a variable for file contents.
    $contents = "";
 
    // Define the upload file name for Windows or Linux.
    if (ereg("Win32",$_SERVER["SERVER_SOFTWARE"]))
      $upload_file = getcwd()."\\temp\\".$_FILES['userfile']['name'];
    else
      $upload_file = getcwd()."/temp/".$_FILES['userfile']['name'];
 
    // Check for and move uploaded file.
    if (is_uploaded_file($_FILES['userfile']['tmp_name']))
      move_uploaded_file($_FILES['userfile']['tmp_name'],$upload_file);
 
    // Open a file handle and suppress an error for a missing file.
    if ($fp = @fopen($upload_file,"r"))
    {
      // Read until the end-of-file marker.
      while (!feof($fp))
        $contents .= fgetc($fp);
      // Close an open file handle.
      fclose($fp);
    }
    // Return file content as string.
    return $contents;
  }

By: Moe

Moe — Fri, 10 Jul 2009 02:26:14 +0000

I'm stumped. I followed all the instructions, I checked the credentials, changed both db connection strings to localhost/xe. There is nothing in the temp directory. When I do a describe on the item table there is a zero in the item_desc column, and nothing (null) in the item_blob column.

By: Michael

Michael — Wed, 01 Jul 2009 16:52:14 +0000

In ZEND I don’t get any errors when I should. So I fixed it by changing a line in php.ini file to say:

display_errors = ON

This enables it because by default it is off.

By: maclochlainn

maclochlainn — Tue, 30 Jun 2009 22:05:30 +0000

I’ll put the following query in the troubleshooting section but here it is. You use the GETLENGTH function from the DBMS_LOB package, like this:

SELECT   i.item_id
,        dbms_lob.getlength(i.item_clob)
,        dbms_lob.getlength(i.item_blob)
FROM     item i
WHERE    i.item_desc IS NOT NULL
OR       i.item_blob IS NOT NULL;

By: michael

michael — Tue, 30 Jun 2009 21:53:36 +0000

how do I query to see if a blob is loaded in a column?