variable scope, PHP4 OOP

[Pig]

I am having trouble accessing an object from within another object. In the code below, the broken_links() function cannot see the $search object. When I var_dump $search, it comes up NULL. $search can see $rules just fine, but $rules cannot see $search.

If I take the contents of main() out of the function and put them in the main stream, everything works fine. I tried making the objects static, but I got errors when I tried to use them (Call to a member function on a non-object)

TIA

<?php

main();
function main()
{
	$rules = new rules;
	$search = new search;
	$search -> crawl();
}

class search
{
	function crawl()
	{
		global $rules;
		$rules -> apply_rules();
	}
}

class rules
{
	function apply_rules()
	{
		global $search;
		var_dump($search);
	}
}

?>

[bpat1434]

How about something like:

class search
{
  var $search;

  function crawl()
  {
    $rules = new rules;
    $search = $rules->apply_rules();
  }
}

class rules extends search
{
  function apply_rules()
  {
    var_dump($this->search);
  }
}

funciton main()
{
  $s = new search;
  $s->crawl();
}

But if you don't send values, the variables will always be null.....

~Brett

[Pig]

I would prefer to know the proper way to do it. So far it's just this one class, but I don't want to end up having 15 classes extend each other when the really don't. I would also like to understandy why $rules can see $search, but not the other way around.

I forgot to mention, this is for a phpgtk app. Don't think it should make a difference, since this piece has nothing to do with the GUI.

[bpat1434]

Okay, why not just send the $search object through the function apply_rules()? Seems to me that would be better because it's what you want to do....

main();
function main()
{
    $rules = new rules;
    $search = new search;
    $search -> crawl();
}

class search
{
    function crawl()
    {
        global $rules;
        $rules -> apply_rules();
    }
}

class rules
{
    function apply_rules($srch)
    {
        var_dump($srch);
    }
} 

~Brett

[Pig]

I appreciate your effort, but I am not looking for a work around. I don't want to vodoo code my program, just to find another less obvious bug resulting 3 months later. I also don't want to pass the arguments of 15 classes to 200 different functions. I want to understand why this doesn't work, and how to make it work with this set up.

Thank you for your help. If you can answer my question, I would appreciate it.