I am making changes to a php framework I downloaded and am new to PHP.

I have this error:

Notice: Undefined index: dec in D:\Hosting\4156 690\html\idingo \modules\groups \group_sort.php on line 49

Line 49 looks like this:


Code:
		if (myNum($groupsSelect) > 0) {
			
			$this_counter= 0;
			
			for ($i = 0; $i <myNum($groupsSelect) ; $i++)	{
...