PHP class: Global variable as property in class

Question

I have a global variable outside my class = $MyNumber;

How do I declare this as a property in myClass?
For every method in my class, this is what I do:

class myClass() {      private function foo() {          $privateNumber = $GLOBALS['MyNumber'];     }  } 

I want this

class myClass() {      //What goes here?     var $classNumber = ???//the global $MyNumber;      private function foo() {          $privateNumber = $this->classNumber;     }  } 

EDIT: I want to create a variable based on the global $MyNumber but
modified before using it in the methods

something like: var $classNumber = global $MyNumber + 100;

Answer 1

You probably don't really want to be doing this, as it's going to be a nightmare to debug, but it seems to be possible. The key is the part where you assign by reference in the constructor.

$GLOBALS = array(     'MyNumber' => 1 );  class Foo {     protected $glob;      public function __construct() {         global $GLOBALS;         $this->glob =& $GLOBALS;     }      public function getGlob() {         return $this->glob['MyNumber'];     } }  $f = new Foo;  echo $f->getGlob() . "\n"; $GLOBALS['MyNumber'] = 2; echo $f->getGlob() . "\n"; 

The output will be

1 2 

which indicates that it's being assigned by reference, not value.

As I said, it will be a nightmare to debug, so you really shouldn't do this. Have a read through the wikipedia article on encapsulation; basically, your object should ideally manage its own data and the methods in which that data is modified; even public properties are generally, IMHO, a bad idea.

Answer 2

Try to avoid globals, instead you can use something like this

class myClass() {  private $myNumber;   public function setNumber($number) {   $this->myNumber = $number;  } } 

Now you can call

$class = new myClass(); $class->setNumber('1234');