Small problem with variable being assigned

Hi Everyone I have a quick question regarding this section of my code.

<?php find_selected_page(); //Returns selected page or subject?>
<?php
if (isset($_GET['page'])){
	$type = "page";
	$fieldname = $sel_page;
	if(intval($_GET['page']) == 0 ){
		redirect_to("content.php");	
	}
}
if (isset($_GET['guide_page'])){
	$type = "guide_page";
	$fieldname = $guide_pages;
	if(intval($_GET['guide_page']) == 0 ){
		redirect_to("content.php");	
	}
}

PHP:

As you can see depending on the value of the GET variable the variable $fieldname is being set. When the GET var is "page" I am having no problems. However for some reason when the GET var is "guide_page" and it reaches this line

$fieldname = $guide_pages;

PHP:

The variable $fieldname is not being set. I did some troubleshooting which led me to this part of the code. I then did print_r($guide_pages) which provided the expected results. I then did print_r($fieldname) and got nothing.

I might have just made a small error in the code, but I can't find it. I also checked my find_selected_page() function which is working properly.

Any help is appreciated, thanks in advance.

 

where is variable $guide_pages set? what does it contain?

do you do print_r for $fieldname right after "$fieldname = $guide_pages" ?

 

$guide_pages is a global variable that is set in the find_selected_page() function I made. Here is the code in that function where it is set:

elseif(isset($_GET['guide_page'])){
			$guide_subjects = get_guide_page_by_id($_GET['guide_page']);
			$sel_subject = NULL;
			$sel_page = NULL;
			$guide_pages = NULL;
}

PHP:

when i did print_r I did it after $fieldname was set.

 

Nevermind, I found the error...its in the code I just posted above. i had the wrong variable set to NULL as you can see. Of course I realize this after I ask for help....thanks though, you question let me to finding the error.

 

You are getting nothing because you are "Setting" the "$guide_pages" to NULL in here:

elseif(isset($_GET['guide_page'])){
            $guide_subjects = get_guide_page_by_id($_GET['guide_page']);
            $sel_subject = NULL;
            $sel_page = NULL;
            $guide_pages = NULL;
}

PHP:

also, are you sure that you had set it to "global" ??? I don't see it on the code above.

~Mike

 

Thanks mike, as said above I found the error, and yes it was global I just didnt include that code.

 

If you use !empty() in the place of isset(), you can check the variables for being set and for having a null value Just thought I would toss that in there too.