Im not exactly sure why Im getting an error. I feel as though I have done this a million times before without a hitch. First off this is running on a php5 server for reference.

im getting this error
call to a member function string_tool() on a non-object in '<some file>' on line 85

that line is
if($core->string_tool($_SESSION['user_id'],'ip')) return(1);

now i know just having the line doesn't help at all without some background so here is a summary of the files.

file1.php
class core {
function __construct() {
if(!include_once('file2.php')) echo "failed to load 'file2.php', must be a brain fart";
}

public function string_tool(<some vars>) {
echo 'woot';
}
}

$core = new core;

file2.php
class users {
function __construct() {
if(!include_once('file2.php')) echo "failed to load 'file2.php', must be a brain fart";
}

public function check_login() {
global $core;
if($core->string_tool($_SESSION['user_id'],'ip')) return(1); // this is line 85
}
}

$users = new users;

If any more information is required just ask. ANY help would be great.

The part in the error 'on a non-object' leaves me to believe that it may not be with my overall scheme but i dont why i would be unable to call that function.

i also attempted to echo some variables in core without success

There is a way to extend classes in php.

Just use the word extend between a new object and your old object. Then you will be able to use $this-> instead of $core->

class newClass extends mainClass{
now you can use all of the objects from the mainClass in your newClass
}


So for your example I think it should be,


class users extends core{
public function check_login() {
if($this->string_tool($_SESSION['user_id'],'ip')) return(1);
}


I hope this helps!