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Posted by Jason Barnett on 06/16/05 19:48
Mike Smith wrote:
> I'm trying to consolidate code in a new project. My dirs are:
> /
> /inc
> core.class.php
> /mods
> /mods/system
> system.class.php //extends core.class.php
> user.class.php //extends system.class.php
>
> In core.class.php I have my generic special html methods and my db
> connection. I'm having trouble accessing $this->db (initialized in
> core.class.php) from user.class.php. Am I wrong in thinking
> user.class.php should be able to access methods/attributes of
> core.class.php?
http://php.net/manual/en/function.include.php
So if user.class.php include()'s core.class.php then you should have the
class definition (for methods) as well as any objects that were created.
in core.class.php. In other words all variables get imported into the
current scope in the calling file.
> I'm running PHP 5.0.4 on Windows
>
> //core.class.php
>
> class core {
>
> var $db;
Is this actually var? Did you possibly call this private / protected?
Var == Public, so the db property of any "core" class should be available.
>
> function core(){
> //initialize db connection (works from here)
> }
> //Other methods
> }
>
> //system.class.php
> include "../../inc/core.class.php";
Note that relative paths can cause problems when you switch the current
working directory. This likely isn't a problem for this particular
issue you're having, but it's a gotcha for future work. What I do for
relative includes is something like:
include dirname(__FILE__) . "../../inc/core.class.php";
> class system extends core {
>
> function system(){
>
/** See note below */
$this->core();
> }
> }
>
> //user.class.php
> include "system.class.php";
> class user extends system{
>
> function user(){
> //$this->db cannot be used here
What exactly do you mean by cannot be used... do you mean that you don't
have access to db? Or perhaps you expect cascading __constructor calls
which PHP does not do by default. Instead you need to call the parent
constructor *explicitly*.
$this->system();
> }
> }
>
> TIA,
> Mike
> "There are no stupid questions." --my professors until I came into class.
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