[PHP] Re: Silly OOP question

[Daniel Schierbeck]

Brent Clements wrote:
I've always wondered this about OOP and maybe you guys can answer this question.
I'm writing a php application and I'm trying to figure out the correct way to 
right the oop part of this application.
for instance.
I have a "project.class" file that has functions for dealing with individual 
projects because you break down ideas into singular entities in OOP(as I understand it)
But what if I wanted to deal with multiple projects such as getting a list of the projects in my database, 
should I create a function in the "project.class" to handle the now plural request, or should I 
create a "projects.class" file that has a function called "getProjects".
Hopefully I'm explaining this question right. It makes sense in my own head. :-)
Thanks,
Brent
Well, if I get you right, you have a class named Project holds 
information about a project. Now you want a list of the current 
projects. I'd make a new class, named ProjectList or something similar, 
that can be used to administrate your projects.

class Project
{
        public $name;    // The project's name
        public $ownerID; // The user ID of the project's owner
        
        /* The constructor. Note: this only works in PHP5 */
        public function __construct ($id)
        {
                $db = mysql_connect();
                // Get project info...
                
                $this->name    = $result['name'];
                $this->ownerID = $result['owner'];
        }
}
class ProjectList
{
        public $projects = array();
        public function __construct ()
        {
                $db     = mysql_connect();
                $query  = mysql_query('SELECT id FROM projects');
                $result = mysql_fetch_array($query);
                foreach ($result as $project_id) {
                        $this->projects[$project_id] = new Project($project_id);
                }
        }
        public function listProjects ()
        {
                return $this->projects;
        }
        public function addProject ($name, $owner)
        {
                // ...
        }
        public function deleteProject ($id)
        {
                // ...
        }
}
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Daniel Schierbeck
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