I can't upload image file

[eluser]Unknown[/eluser]
I can't upload image. I follow this CI User Guide. I copy - paste in my text editor.
But when I executed at my localhost, the error variable was appearing in my view page like this:

A PHP Error was encountered
Severity: Notice
Message: Undefined variable: upload_data
Filename: views/v_blog.php

and this is another one:

A PHP Error was encountered
Severity: Warning
Message: Invalid argument supplied for foreach()

Help me please to solve or explain what's the problem :roll:

[eluser]mstojanov[/eluser]
Maybe you should give us more informations.
Paste your controller, paste your form to check.

Thanks

[eluser]Tpojka[/eluser]
Probably used incorrect variable in foreach loop in your view.
We need controller and view code to determine as already said.