Classes and other object issues....

[tha_mink]

How can you use a class inside of another class? Consider the following.

class myClass 
{
   var $user_id;
   var $username;
   var $password;
   var $something;
   var $db;  // i would like this to be the pear DB object...
   // some functions here .... to set variables and so forth
   // then I do something like this...

   function getUserData(){
     $data =  $db->getOne("SELECT something FROM sometable WHERE username='$this->username'");
       return $data;
   }

} // end class
/// sql config and DB object  included in a seperate file...
require_once( 'DB.php' );
$db = DB::connect( "mysql://$dbuser:$dbpass@$dbhost/$dbname" );
if (DB::isError($db)) {       

   die ($db->getMessage());
}
$db->setFetchMode(DB_FETCHMODE_OBJECT);
PEAR::setErrorHandling(PEAR_ERROR_DIE);


/// then... /// code here...

$mem = new myClass;
$mem->username = "someusername";
$mem->db = $db;
$mem->getUserData();

I get the old "Member function of non object" error. How can I use the $db object without extending pears DB.php?

[Wynder]

Put simply, you cannot have a class within a class. Trying to do:

class foo
{
   class bar
   {
   }
}

kicks back an error.

If you want to add to a class method and variable-wise, you need to extend the class.

[GreyBoy]

You can create a new instance of a class with in another class...

<?
        class foo
       {
             // code
       }

   class bar
   {
       var $foo;

       function bar()  // Class constructor
       {
             $this->foo = new foo;
       }
    }
?>

[GreyBoy]

Depending on your application, I would probably recommend extending the class.

[ahundiak]

Your orignal code should work. You just left a 'this' out.

function getUserData()
{ 
     $data =  $this->db->getOne("SELECT something FROM sometable WHERE username='$this->username'"); 
       return $data
}

Also, you probably want to use references when assigning just to avoid possible copy problems.
$mem->db =& $db;