Function inside a class function!!

aldoh

Hi all:

This is my problem.

Im writing a class, wich use some function inside a function class
something like:

class foo{

 public $dummy;

function __construct(){

 $this->dummy = "Some value";
}
function meth_1(){
     print $this->dummy."</br>";
     function meth_1_1(){
          //i want to have acces to $this variable from this method?
          print $this->dummy." plus </br>"; // This do not work!!!
     }
}


}

$c = new foo();
$c->meth_1();

//Output
Some value

//Desired output
Some value
Some value plus

I wich to access the class object inside a fucntion inside a class function, i get a error "using $this when not in objet context"

I understand why, but i dont know how to fix it.

I try using global outside the function meth_1_1, but that doesnt work niether.

any ideas??

halojoy

<?php

class foo{

// variables
    public $dummy;

////////////////////////////
// constructor function
function __construct(){
    $this->dummy = "Some value";
}

// functions
function meth_1(){
    print $this->dummy."</br>";
    $this->meth_1_1();
}

function meth_1_1(){
    print $this->dummy." plus </br>";
}

}// end class foo

?>

this is the way i have seen they use
- they NEVER DEFINE functions inside another
but they can CALL from inside another function

in that case above
you have 2 options:

run
first function, which will reslut in BOTH functions will be executed
dummy."</br>".dummy." plus </br>"

run
second function, when only second will be excuted:
dummy." plus </br>"

======================

Very good tutorials on classes at http://www.zend.com/

1)
for beginners - the basics
http://www.zend.com/php/beginners/php101-7.php

2)
for medium to advanced
http://www.zend.com/zend/tut/class-intro.php

3)
This is a good article WITH CODE Examples at http://www.phpfreaks.com/
Introduction to PHP Classes (OOP)
http://www.phpfreaks.com/tutorials/48/0.php

Enjoy!

aldoh

I just found the solution.

Add global $variable to both functions! so in that way you can acces object from outside the function

aldoh

I will recode as:

class foo{ 

 public $dummy; 

function __construct(){ 

 $this->dummy = "Some value"; 
} 
function meth_1(){ 
     print $this->dummy."</br>"; 
     global $internalthis;
     $internalthis = $this;
     function meth_1_1(){ 
           global $internalthis;
           print $internalthis->dummy; // Now i have acces to the class properties
     } 
} 


}

just in case someone found this usefull!!

halojoy

it looks a bit strange to me
but if it works

now only one thing.

a class is only a definition ( like definin a function )
with your setup, what is the benefit - the actual use of it
compared to normal method I posted.

What is the purpose of getting hold of an internal object?
Because an object can only deliver a variable value or call a function
and all this is possible with normal class handling.

Give an example
how you use your setup

and i am sure anything you achieve is possible in 'a normal way'
maybe even with less coding and better clarity of the process in work.

To me it looks as you have complicated things, unnecessarily.
But maybe someone can tell, if i missed something here.

🙂

aldoh

I did this to use the xajax class from http://www.xajaxproject.org.

A normal use of the class:

$xajax = new xajax();
$xajax->registerFunction("send");

function send(){
     $objResponse = new xajaxResponse();
     $objResponse->addAlert('from Ajax call')
     return $objResponse->getXML();
}
$xajax->processRequests();

Basicly the script call the function send() from a javascript. So i can execute php code asynchronously from a javascript called xajax_send() that will return a javascript: alert('from Ajax call').

Now, i use this code to encapsulate the xajax inside a class:

class foo{ 

 public $dummy; 

  function __construct(){ 
     $this->dummy = "Some value"; 
    $this->meth_1(); //Set up the xajax class
  } 
  function meth_1(){ 
       global $interThis;
       $interThis = $this;//Reference to the class  

       $xajax = new xajax();
       $xajax->registerFunction("send");

    function send(){
         global $interThis // give acces to the class method and properties
         $objResponse = new xajaxResponse();
         $objResponse->addAlert($interThis->dummy.' from Ajax call')
         return $objResponse->getXML();
   }
   $xajax->processRequests();


  } 


}

So, in this way i can call the xajax from inside a class, and every time I intance the foo class, i will have acces to use a javascript function called: xajax_send that will return a javascript alert('Some value from Ajax Call').

Im doing is a class to manage all the update, insert, delete for my database tables, using xajax. Now i can update, insert, delete rows sending javascript functions that manage that with out sending all the page, only calling the php function to update, insert or delete the row. Got me??