PHP: is it possible to call nesting object's method inside nested object?

Question

I don't know how to explain this better, so (see comment inside second class):

<?php

    class main {
        public function something() {
            echo("do something");
        }
        public function something_else() {
            $child=new child();
            $child->child_function();
        }
    }

    class child {
        public function child_function() {
            echo("child function");
            //is it possible to call main->something() here somehow if this class is initiated inside class main?
        }
    }

?>

Yes, you can pass $this (inside main) to the constructor of child. Be careful you don't end up with spaghetti, though! — halfer
– halfer, Commented Sep 20, 2012 at 9:00
Thanks deceze and Mihai, I've used your advice and it works just fine. — Caballero
– Caballero, Commented Sep 20, 2012 at 9:17

deceze · Accepted Answer · 2012-09-20 09:00:37Z

2

No. Objects do not simply have access to stuff in a higher scope. You need to pass main into child explicitly:

$child->child_function($this);

answered Sep 20, 2012 at 9:00

deceze♦

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Comments

Riz · Accepted Answer · 2012-09-20 09:03:19Z

0

You have defined the function something_else as public, so you can access that after creating object of main class.

answered Sep 20, 2012 at 9:03

Riz

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Comments

Mihai Iorga · Accepted Answer · 2012-09-20 09:04:26Z

0

try this,

    class main {
        public function something() {
            echo("do something");
        }
        public function something_else() {
            $child=new child($this);
            $child->child_function();
        }
    }

    class child {
        protected $_main;
        public function __construct($main)
        {$this->_main = $main;}
        public function child_function() {
            echo("child function");
             $this->_main->something();
        }
    }

?>

edited Sep 20, 2012 at 9:04

Mihai Iorga

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answered Sep 20, 2012 at 9:03

Tarun

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Comments

Kao · Accepted Answer · 2012-09-20 09:12:55Z

0

You can extend your child object with main.
This allows child to access the parent classes by calling $this->something(); as it becomes a member of the main class, and gains access to all of it's properties and methods.

<?php    
    class main {
        public function something() {
            echo("do something");
        }
    }

    class child extends main {
        public function child_function() {
            echo("child function");
            //is it possible to call main->something() here somehow if this class is initiated inside class main?
            $this->something();
        }
    }

?>

if you want to __construct() in both you can do:

public function __construct () {
    parent::__construct();
}

This goes for all methods.

edited Sep 20, 2012 at 9:12

answered Sep 20, 2012 at 9:07

Kao

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