[RESOLVED] Sharing PHP Classes with each other?

[Yari]

Hi,

I am building a CMS for a photo gallery. For this I have several classes, such as:

Artist
Album
Gallery
Photo

The way it works is, an Artist can have multiple Albums. An Album can have galleries, and a gallery photos. Each of these has a different file for its class, but they all use the Photo class...

Is there an easy way to access the photo class from within another class? And without re-declaring the Photo var's from within the Gallery or Album class?

This is a simplified version of what I have:

class Gallery {

var $gallery_name;
var $photo_id;
var $photo_name;

function Gallery($id) {

// Get all gallery details from DB
		if (!($result=mysql_db_query(DB, "SELECT * FROM gallery WHERE gallery_id='$id'"))) {
			ErrorMessage(sprintf("error getting all galleries %d:%s\n", mysql_errno(), mysql_error()));
			exit();
		}
		$row=mysql_fetch_array($result);
		$this->gallery_name=$row["gallery_name"];

	// Get Photos for this Gallery, from PHOTO class
	include_once("classes/class_photo.php");
	if (!is_object($photo_class)) {
		$photo_class = new Photo($id);
	}

	// so, this gets all photos for this gallery... but then I have to declare:

	$this->photo_id=$photo_class["photo_id"];
	$this->photo_name=$photo_class["photo_name"];

	// ...etc, as the var's aren't declared
}
}

Note that I have to declare the photo vars in this class to get it to work, and assign them a value from the photo_class vars... there must be a better way to do this as some of my classes have heaps of vars.

Thanks,

Yari

[bough]

You could have your class 'Gallery' extend your 'Photo' class
i.e

class Photo {
var $gallery_name;
var $photo_id;
var $photo_name;

class Gallery extends Photo {

this would mean that your Gallery class would be able to access all the functions and variables from your Photo class, unless you are using PHP5 and declare the variables as private

i.e

you will be able to use the variables from the Photo class in your Gallery class just like $photo_name = ""

I am not sure if this is what you mean?

[vaaaska]

I asked more or less the same question last week...sure it's possible but I don't know how. What I realized though is that you can create your Class outside of the Class you are trying to use and then simply pull it in.

class Published
{
	function Published()
	{
		global $db;

	// $db is my connection Class
	// all my methods become available within this class too

	$this->db = $db; // so i don't need to global it all the time

	// we get settings here...
	$this->settings = $this->db->fetchRecord("SELECT * FROM settings,site");
	// if no results let's kill it...
}

// .........

[Yari]

Ahah, extending my Class!

Brilliant, that worked like a dream... now I can access my other classes easily, and break them into their proper functions.

Thanks guys!