Question

I just don’t understand why i can’t call an object like this.

<?php

$obj = (object) array (
        "happy" => " :) ",
        "sad" => " :( "
);

class MyClass
{
    function __construct () {}

    function something ()
    {
        echo "Hello World\n";
        echo $obj->sad;
    }
}

$class = new MyClass();
echo $obj->happy;
$class->something();

the output seem like

:) Hello World

and it’s not what I expect. i.e.

:) Hello World :(

how can I make this work??

EDIT:
This is in what I will implement this example. passing objects from the global scope to a model

Answer 1

<?php

$obj = (object) array (
        "happy" => " :) ",
        "sad" => " :( "
);

class MyClass
{
    function __construct (){
    }

    function something ()
    {
        global $obj;
        echo "Hello World\n";
        echo $obj->sad;
    }
}

$class = new MyClass();
echo $obj->happy;
$class->something();

?>

That will be a way of doing it.
obj is not in scope here, you have to either make it global, or pass it.

Pass it to constructor and save instance..as here

<?php

$obj = (object) array (
        "happy" => " :) ",
        "sad" => " :( "
);

class MyClass
{   private $obj;
    function __construct ($obj) {
     $this->obj=$obj;

    }

    function something ()
    {
        echo "Hello World\n";
        echo $this->obj->sad;
    }
}

$class = new MyClass($obj);
echo $obj->happy;
$class->something();

But you will have to access $obj as $this->obj from all functions