Assign function to class....

[alaincch]

Is it possible to assign some functions to a of a class?

class loginClass {
      function initialize() {$something}
}

function CheckLogin() {
      $something
}

$login = new loginClass();
$login->onLogin = CheckLogin();
$login->initialize();

where the CheckLogin function will only be run during the initialize of the class, not during loading of the whole document. Thanks

[thorpe]

this doesnt make sense. you can have properties assigned upon class initialization by using a __construct(), but id dont think that what you meen. your going to need to be a bit more specific about what it is exactly you are trying to do.

[Weedpacket]

Do you mean static initialisation as opposed to instantiation?

[Kudose]

Basically all you are doing with what you're showing us is setting the value of onLogin to the return of CheckLogin.

I whipped this up for you ...

<?php
  session_start();

  class foo {
    var $onLogin = "";
    var $sid = "";

function foo(){
  return;
}

function initialize($sid){
  $this->sid = $sid;
  $_SESSION['sid'] = $this->sid;
}
  }

  function checkLogin($uname, $pwd) {
    if($uname == 'Foo' && $pwd == 'bAr')
      return session_id();
    else
      return false;
  }

  $class = new foo;
  $class->onLogin = checkLogin('Foo', 'bAr');
  if(!empty($class->onLogin))
    $class->initialize($class->onLogin);
  else
    die('Bad credentials');  

?>

The only thing it does is check a static username and password and sets a session variable for later access to verify the user has logged in before. It may not be the best example, but it works ... proving that what you, in a round about way, asked is possible.

[Shrike]

Attack of the reoccuring thread.

[alaincch]

Hie all, thanks for your replies.

And Kudose, from your example, you are assigning the result of the function to the class property. Is it possible that we just "point" to the function without executing it? Where it will only be executed when we call some class methods we had created.

Thanks.

[Weedpacket]

You can store a static function in a variable, yes.
$callback = array('classname', 'methodname');

class foo
{
function wibble($name)
{echo 'Hello, '.$name;}
}


$thing = array('foo','wibble');


call_user_func($thing, 'World');

[alaincch]

/** Session File **/
class sessions {
    var $act, $form;

function init() {
    session_start();

    if ($this->act == "Logout")
        echo $this->logout($this->form);
    else if ($this->act == "Login") {
        if (is_callable($this->onValidate))
            $this->onValidate;

        echo $this->loginform($this->form);
    }
    else
        echo $this->loginform($this->form);
}

function loginform($action) {
    $res = "<form>....</form>";

    return $res;
}
}


/** Function File **/
function callback_validate() {
    return $somethin;
}


/** Main Index File **/
$sess = new sessions();
$sess->onValidate = callback_validate();
$sess->init();

The question is, is it possible to assign the "callback_validate" function to the "$sess-onValidate" without executing it? It'll only be executed while "$sess->init()" is called. I tried "call_user_func", but it seems to be quite complicated if i need to pass in few variables in.

Thanks