What is the best way to declare a global variable in cakePHP

Question

I am learning cakePHP 1.26.
I got a Controller which got two functions.
I was thinking to make $myVariable a global variable so that both functions in the controllers can share it, but I am not sure if this is the best way to declare a global variable in cakePHP:

class TestingController extends AppController {  
     var $myVariable="hi there";

    function hello(){
     if($newUser){echo $myVariable;}
      }

     function world(){
      if($newUser=="old"){$myVariable="hi my friends";}
      }
 }

Please help if you could.

edited reason:

Hi Aircule,

I have altered a little bit to the code and followed your suggestion, but the value of myVariable was not changed at all:

class TestingController extends AppController {  
         var $myVariable="hi there";

        function hello(){
         echo $this->myVariable;
          }

         function world(){
          $this->myVariable="hi my friends";
          }

         function whatValue(){
         echo $this->myVariable;  // still output "hi there"
        }

     }

@ Aircule. I have been learning cakePHP 1.26 for a few weeks, and I am more familiar with this version. — user327712
This is not a global variable, but rather a class variable. If you really wanted a global in cake, you would use Nik's suggestion regarding Configure:: — atp

quantumSoup quantumSoup · Accepted Answer · 2010-07-17T17:14:16

class TestingController extends AppController {  
     var $myVariable="hi there";

    function hello(){
     if($newUser){echo $this->myVariable;}
      }

     function world(){
      if($newUser=="old"){$this->myVariable="hi my friends";}
      }
 }

(note that as it is $newUser is undefined when you call the methods).

You should read this: http://php.net/manual/en/language.oop5.php

What is the best way to declare a global variable in cakePHP

2 Answers