Suppose I have an install.php file, and install.php has $ 5 _REQUEST
I.e:
$_REQUEST['step'] 5 штук. step=1; step=2; step=3; step=4; step=5
How can I make the page source code (install.php) displayed, as well as if I’ve scored in the install.php address bar? Step = 1, then the content changes. The same as organizing the function of limiting step. Ie, with step = 1, it is impossible to go to step = 3, as well as restrictions, that stepov is only 5 and they cannot be negative.