[RESOLVED] Class extends

[saint4]

user.class.php

class user
{
	public $id = 0;

public function detail ( $detail )
{
	$db->query_field ("SELECT $detail
	FROM userstable
	WHERE id=$id",
	$detail);
}
}

community.class.php

class community extends user
{
	public function name ()
	{
		return $this->detail ('username');
	}
}

include_once ('user.class.php');
include_once ('community.class.php');

$user_data = new user;
$user_data->id = 2;

$community_pages = new community;
echo $community->name ();

This is an example quickly drawn up. Can someone tell me why this does not work please.

[NogDog]

"extends" applies to the class definition, making the child class definition doing the extending inherit all the non-private properties/methods of the parent class definition. But they are still two separate class definitions: instantiating the child class as an object does not give it any special access to a object instantiated from the parent class; they are still two separate objects and know know more about each other than would, say, a MySQLi object and a SimpleXml object.

Perhaps what you want to do ("perhaps" since I don't know the underlying design requirements here) is:

include_once ('user.class.php');
include_once ('community.class.php');

$community = new community();
$community->id = 2;
echo $community->name ();

[saint4]

Thanks for that. I wasn't sure how to use extends but now I do just because of that little example/tweak you did.

When I try to explain things I confuse myself. Especially since I dont actually use the code i work with but mke up examples.

Thanks for the help.