Page refresh after done loading, add up variable

Question

$test = $_GET['nr'];
    $class = new class;
    echo $class->function($test);

I want $test to increase after it have fully loaded the page.

The problem is, I don't know how. Looping $test normally will show me a lot of errors. like function cannot be declared again I've have the same functions names with different functionality. And it's pretty long code.

Anyone have any idea how I can do this? Thanks.

EDIT:

When the page is fully loaded, I want it to add + 1 to $test and then refresh it with the new variable.

I can do this manually by:

$next = $test + 1;
    echo "<a href='/index.php?nr=". $next . "'>Next page</a>";

Answer 1

If you are storing the page in a string variable and outputting at the end you can just do a meta refresh:

$next = $test + 1;
echo "<meta http-equiv=\"refresh\" content=\"5; url=/index.php?nr=$next\">";

...will refresh the page 5 seconds after loading completes.

Failing that, you can do a simple javascript refresh:

$next = $test + 1;
echo "<script type=\"text/javascript\">\nfunction reloadPage() {\nwindow.location.href = '/index.php?nr=$next';\n}\nsetTimeout(reloadPage,5000);\n</script>";