Call function across classes through controller [closed] - php

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I have this controller class.
<?php
class controller{
function __construct(){
$this->db = new db;
$this->output = new output;
}
}
class db{
function get(){
return 'value from db';
}
}
class output{
function view(){
print $controller->$db->get();
}
}
$c = new controller;
$c->output->view();
?>
Ofcourse this is not working, but i think it gets across the idea of what i'm trying to do. How should i do this?

Answer 1

<?php
class controller{
function control($db, $output){
$data = $db->get();
$output->view($data);
}
}
class db{
function get(){
return 'value from db';
}
}
class output{
function view($data){
print $data;
}
}
$db = new db;
$output = new output;
$c = new controller;
$c->control($db, $output);
?>

Answer 2

Here you can use PHP5 Type Hinting. You can read more here
Code:
<?php
class controller
{
function __construct()
{
$this->db = new db;
$this->output = new output($this->db);
}
}
class db
{
function get()
{
return 'value from db';
}
}
class output
{
private $_db;
public function __construct(db $get)
{
$this->_db = $get->get();
}
public function view() {
return $this->_db;
}
}
$c = new controller();
echo $c->output->view();
In this example:
We're type hinting the class of db passing the $this->db instantiated object to the controller class __construct magic method.
And then on output class we're passing the actual classname db with instantiated variable and getting the method get() and storing the value to the private $db_ property and returning to view() method.
Hope it helps!