Return self ?

Tanax · 11-12-2008, 07:28 PM

Hi!

You know when you want to use chains in regular classes, you return $this?

PHP Code:


			
public function smthng()
{

       $this->somevar = 'smthng';
       return $this;

}

My question regards how you do this when the whole class is static(it's a factory)?

PHP Code:


			
public static function smthng()
{

       self::$somevar = 'smthng';
       return self;

}

??

Also, if this is possible, how does the actual chaining work?
I mean.. do you use it like:

PHP Code:


			
FACTORY::smthng()::smthng()::smthng;

??

Runar · 11-12-2008, 08:06 PM

I know I used $this in a situation similar to your first example. In your last example, the actual chaining, I did something like this:

PHP Code:


			
$class->first()->second();

I am not sure if there is any significant difference on static and non-static classes when chaining, but I guess other people will answer that question.

Salathe · 11-12-2008, 09:03 PM

As far as I'm aware, that's not possible at the moment.

Tanax · 11-12-2008, 10:57 PM

Quote:

Originally Posted by Runar

I know I used $this in a situation similar to your first example. In your last example, the actual chaining, I did something like this:

PHP Code:


			
$class->first()->second();

I am not sure if there is any significant difference on static and non-static classes when chaining, but I guess other people will answer that question.

Yes, I know how to do actual chainings with the regular classes, it's just the little problem that this isn't a regular class

Quote:

Originally Posted by Salathe

As far as I'm aware, that's not possible at the moment.

Doh! Okey, thanks!

jlodell · 02-22-2009, 07:37 AM

I'm interested in why you would try to call the same method over and over like that or was that just kind of for show? Do all the methods have to be static, or could you just implement the static factory method(s) and then normal methods for any others:
ClassName::factory()->meth()->again()\
static chaining wont work because it doesn't use a class instance for reference, it uses a class name

Tanax · 02-27-2009, 11:21 PM

I don't wanna call the same method over and over xD I just wanted to get my point out, if it was possible to chain static methods

jlodell · 02-28-2009, 06:57 AM

@tanax: I understand, and I'm definitely not flaming. Just new to the forum and wanted to post a couple things. Just threw the explanation in for those that might not understand the method chaining process or why static methods cannot be chained. Cheers.

Tanax · 02-28-2009, 12:46 PM

Sure np ! I didn't think you were flaming though, I just wanted to make my point more clear if someone didn't understand

frome · 01-18-2013, 07:43 AM

thought this was a interesting topic so i made a experiment.

I make a class with static functions and used singleton pattern.

like so

PHP Code:


			
<?php
class helloWorld{

    private static $instance = false;

    static private function thisInstance(){
        if(self::$instance === false){
            self::$instance = new helloWorld;
        }
        return self::$instance;
    }

    static public function talk($arg){
        echo $arg;
        return self::thisInstance();
    }

}

then i used

PHP Code:


			
helloWorld::talk('Yo yo world.')->talk(' sup y\'all');

and i worked like a charm :)

output: Yo yo world sup y'all

hope it helps 6 years later XD

wangna · 01-26-2013, 07:59 AM

I know I used $this in a situation similar to your first example.

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