hello i need help.

im using this script

PHP Code:

<?PHP
/*include("classic/".$id .".php");*/
if(!isset($_GET['id'])){
    $page = "main";
    }
    
else {
    $id = $_GET['id'];
    }
  
if(file_exists("classic/".$id .".php")){
    include("classic/".$id .".php");
    }
else {

/* Put your own error message or some other content.  
    Even a redirect to the main page would work           */                                            
include("classic/main.php");
}
?>

the linking works fine. but when the home page. it shows
Notice: Undefined variable: id in classic.php on line 135

and line 135 is

PHP Code:

if(file_exists("classic/".$id .".php")){ 


is there something i missed? is there a better way to do this?
the server im using is a windows server but using php5.

please help me

thanks

In the case that $_GET['id'] is not set you still execute the line that you get the error on. So you need to either set id to something in your if statement, or you need to put your second if/else within your first else statement. So either:

PHP Code:

<?PHP
/*include("classic/".$id .".php");*/
if(!isset($_GET['id'])){
    $page = "main";
    $id = 'something';
    }
    
else {
    $id = $_GET['id'];
    }
  
if(file_exists("classic/".$id .".php")){
    include("classic/".$id .".php");
    }
else {

/* Put your own error message or some other content.  
    Even a redirect to the main page would work           */                                            
include("classic/main.php");
}
?>

OR

PHP Code:

<?php
/*include("classic/".$id .".php");*/
if(!isset($_GET['id'])){
    $page = "main";
    }
    
else {
       $id = $_GET['id'];
       if(file_exists("classic/".$id .".php"))
       {
           include("classic/".$id .".php");
      }
      else 
     {

          /* Put your own error message or some other content.  
              Even a redirect to the main page would work           */                                            
          include("classic/main.php");
    }
}
  
?>