PHP Errors Undefined variables, Object of class stdClass could not be converted to string, form dropdowns

I doubt if I can debug your application but I can, perhaps, explain a little about it in a way that might put you on a stronger footing.

The messages you're seeing are not Errors (Error is a term of art in PHP programming).  They are Notices and Warnings.  Usually these lower level messages do not result in script termination.  They may result in data loss and should be corrected.

You'll get a Notice if your script attempts to use an undefined variable.  The Notice will show you the line number.  You would want to go into that script and see what variable was undefined, then trace the logic backwards to the place where the variable should have been defined, and make an assignment statement at that location.  If the undefined variable occurred in an included module, you may find the assignment was "up-stream" in the include path(s).

You'll get a Warning if your script attempts to use the wrong data type.  In the instant case the foreach() statement expects to iterate over an array or an object, but the data passed to foreach() was something else.  This iterator error often happens after a data base query failed, but the failure was undetected.

Here's a little more legible version of the messages.

Hi Ray,

Thanks for your advice most helpful and informative. I will continue to analyse and work back from those lines to the point where they should have been initialised.

Thank you very much

John

Hi Ray,

I am grateful for your efforts with this question. You helped me face the reluctance I was feeling to sort out my own problems.

When I was writing my question I was wondering if I should have really asked 2 or perhaps 3 different questions, there was the issues I have been having with CodeIgniter, the PHP error reporting  level, variable scope, initialisation.

Unfortunately I was frustrated and annoyed when I wrote my question and I shouldn't have combined it all into 1 question.
Bearing in mind the advice you had given me I determined I would search out the information I needed, I was looking for examples of codeigniter applications so that I could analyse digest and grow from the experience and I found a tutorial about 40 minutes long that answered many of my questions and I am so pleased to pass on the link to this course so that other people can benefit from it.
http://www.revillweb.com/tutorials/codeigniter-tutorial-learn-codeigniter-in-40-minutes/#comment-138.

The course had an excellent bit about private class variables and so I got the whole question cleared up in one hit.

You put me into the correct frame of mind to sort this out so the 500 points are yours
Thank you very much
John

Thanks, John.  Best of luck with your project, ~Ray