CODEWITHSUNDEEP
phpclassoop
Omar Juvera
Omar Juvera

Reputation: 12287

PHP: How to properly create an instance of a class within a class? (AKA use a class within a class)

I am reading that the best way to use a class properties (database class) within another class (html class) is to create an instance of that class within the class (html). As to why, I am not sure...but anyway.

How is this done? I have two scenarios, to see which one(s) are correct and which ones are wrong...

Scenario A

require( database.php );

class html(){
    private static $db = null;
    private static $page = null;

    public function __construct($id){
        self::bootstrap($id);
    }

    public static function bootstrap($id){
        self::$db = new database();
        self::$page = $db->page($id);
        return self::$page;
    }
}

//$page = new html('hello-world');
//print $page;
print html::bootstrap('hello-world');

Scenario B

//Class autoloader
spl_autoload_register(function ($class) {
    include $_SERVER['DOCUMENT_ROOT'] . '/class/' . $class . '.php';
});


//Scenario B code
class html(){
    private static $page = null;

    public static function bootstrap($id){
        self::$page = database::page($id);
        return self::$page;
    }
}

print html::bootstrap('hello-world');

Perhaps you have a different scenario that's appropriate, if these are the wrong approach

Upvotes: 0

Views: 68

Answers (1)

qtuan
qtuan

Reputation: 687

I would say no scenario is wrong, but scenario B is more appropriate. Since page was designed as static method in database class, that informs the intentional usage of the method.

Upvotes: 1

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