CODEWITHSUNDEEP
phpscope
andrew
andrew

Reputation: 9593

scope of class properties in php

I have a class which is instantiated globally and in turn instantiates a second class from within its constructor. What I can't figure out is how to gain access to properties of the first class from the second.

 <?php

    class Foo 
    { 
       public $bar;
       public $myProperty;
       public function __construct() 
       {
           $this->bar = new Bar();
           $this->myProperty='hello';
       }
    }

    class Bar 
    { 
       public function __construct() 
       {
           echo $foo->myProperty; //I can't see that from here
       }
    }

    $foo = new Foo(); 

   ?>

what might be the correct way of going about this?

Upvotes: 0

Views: 86

Answers (1)

Barmar
Barmar

Reputation: 782755

You problem has nothing to do with scope of class properties, it's with scope of ordinary variables. $foo is a global variable, so it's not normally visible inside functions. You need to do:

public function __construct() 
{
    global $foo;
    echo $foo->myProperty;
}

However using global variables is usually bad form. It would be better if you passed $foo as a parameter to the Bar constructor.

Upvotes: 3

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