CODEWITHSUNDEEP
phpclassobjectstaticcall
Lee
Lee

Reputation: 5936

PHP Static Calls from a Object

I have a PHP class method which is using a static function from with a another class. How do i enable that static function to modify variables within the calling class.. Example as follows:

PARENT:

class sys_core
{
   public $test = 'no';

   // --------------------
   public function __construct()
   {
   }

   // --------------------
   public function init()
   {
      sys_loader::load_config('123');
      print $this->test;
   }

   // --------------------
   // --------------------
   // --------------------
   // --------------------
   // --------------------

} // END Class

STATIC CLASS

class sys_loader
{
   private $registry = array();

   // --------------------
   public static function load_config($file)
   {
      $this->test = 'yes';
   }

   // --------------------
   // --------------------
   // --------------------
   // --------------------

} // END Class

ERROR:

Fatal error: Using $this when not in object context

Upvotes: 0

Views: 641

Answers (4)

iletras
iletras

Reputation: 244

As I see it, sys_loader can modify sys_core's $test 3 ways:

1) sys_loader is passed a reference to sys_core->test,
2) sys_loader returns a new value for it or
3) equip sys_core with a setter for $test and pass sys_loader a reference to sys_core.
With that reference, sys_loader can access whatever variables and functions sys_core allows.

Here are the bits I changed/added to make #3 work:

Example use:

$sc = new sys_core();
$sc->setConfigFile('123');
$sc->init();

Output:
123yes

class sys_core

// new
private $configFile = null;

// new
function getConfigFile() {
  return $this->configFile;
}

// new
function setConfigFile($value) {
  $this->configFile = $value;
}

// new
function setTest($value) {
  $this->test = $value;
}


public function init()
{
// sys_loader::load_config('123');
  sys_loader::load_config($this);
  print $this->test;
}

class sys_loader

// public static function load_config($file)
public static function load_config($caller)
{
// $this->test = 'yes';
  $caller->setTest('yes');
// new, example
  $config = $caller->getConfigFile();
// new, example
  echo $config;
}

Upvotes: 2

C-F
C-F

Reputation: 1778

If it helps, you can pass a reference to your sys_core instance as a parameter to the sys_loader::load_config method:

class sys_core
{...
    public function init()
    {
       sys_loader::load_config('123', $this);
       print $this->test;
    }    
 ...
}

class sys_loader
{
  ...
   // --------------------
   public static function load_config($file, $core)
   {
      $core->test = 'yes';
   }
 ...
}

Upvotes: 1

Christian Neverdal
Christian Neverdal

Reputation: 5385

You can't. By definition, static means not tied to any object. (What are you trying to accomplish here?)

Static methods are per class, they can take in parameters and modify static variables. Figure out what you need, draw a diagram, and implement it.

Upvotes: 0

user656925
user656925

Reputation:

You can access any public member outside of that class, private members can only be accessed by the class itself, and protected members can be accessed by sub-classes.

self is used for static members...one per class.

this is used for non-static members...one per instance.

Upvotes: 0

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