Question

I’m trying to write a list of files and drop them into an array.
Have to change the content on a page calling external contents.

I’ve found this little piece of code and trying to make it work.
LINK (last comment)

$all_pages=array("main","page_two","page_three");    
$page = $_GET['page'];    
if( isset($page) and array_key_exists("$page", $all_pages) ) // added a missing ')'
{
include('subfolder/folder/'.$_GET['$page'].'.html');
}

well, this does not work.
Just can’t get to the right file. (the content shows always empty).

I (try to) call the files like:

<ul>    
   <li><a href="template.php?main">Main content</a></li>
   <li><a href="template.php?page_two">Second content</a></li>
   <li><a href="template.php?page_three">Third content</a></li>
</ul>

Thanks in advance!

Answer 1

You would have to use in_array() to test for allowed values. array_key_exists would require the page names to be array keys.

Secondly, $_GET["page"] will be empty, as you didn’t have a get parameter of that name. You must adapt your links:

   <li><a href="template.php?page=main">Main content</a></li>
   <li><a href="template.php?page=page_two">Second content</a></li>
   <li><a href="template.php?page=page_three">Third content</a></li>

(Or otherwise use $_SERVER["QUERY_STRING"]. But you probably don’t want to do that.)

Your third problem was using:

include('subfolder/folder/'.$_GET['$page'].'.html');
                            ^^^    ^^^

You should have used just the $page variable here, which you already read from $_GET. Using that name as key again would not work. And you additionally used it ín single quotes (doubly wrong, but luckily without effect).

So correct would be:

$all_pages = array("main", "page_two", "page_three");    
$page = $_GET['page'];
if ( in_array($page, $all_pages) )
{
    include('subfolder/folder/'.$page.'.html');
}