Joomla 2.5 cant use $this in helper file

Question

I have created a component and a plugin in joomla 2.5 and there is a Helper file in the component which will have many useful functions and I plan to call one of its function which then calls another function in the helper by this code:

$this->getinformation();

and it gives me this error :

Fatal error: Call to undefined method

My questions are:

Why can't I call a function in a helper in Joomla?
How can I call a function inside helper class?
Is there any class structure which i missed in this code?

First off in order to use $this your helper file needs to be a class. Is it a a class or just a collection of functions. What does your helper file look like? — Cleanshooter, Nov 20 '12 at 16:05

Søren Beck Jensen · Accepted Answer · 2018-12-07T08:36:17.563

5

Helper files are typically called statically and not using $this

First create your helper file and add methods like this:

Class myHelper {

    //This method can call other methods
    public static function myMethod($var) {

        //Call other method inside this class like this:
        self::myOtherMethod($var);

    }

    //This method is called by myMethod()
    public static function myOtherMethod($var) {

        //Put some code here

    }

}

Simply include the helper file like this in the documents that you would to use it:

require_once JPATH_COMPONENT.'/helpers/my_helper.php';

Then use it like this:

myHelper::myMethod($var);

or

myHelper::myOtherMethod($var);

edited Dec 07 '18 at 08:36

answered Nov 21 '12 at 08:28

Søren Beck Jensen

1,676
1
12
22

That was static function kind of problem , I create a instance of the class and issue gone . it happen before your answer but thank you anyway . – Nov 21 '12 at 10:41
1

Shouldn't be `self::myOtherMethod($var);` instead of `self:myOtherMethod($var);` ? – dolma33 Dec 05 '18 at 18:13
Yes it should. Fixed. Thanks. – Søren Beck Jensen Dec 07 '18 at 08:36

score 0 · Answer 2 · answered Nov 20 '12 at 12:32

0

You have to include the helper file and call the function using the classname

Add the following line in the plugin or component:

jimport( 'joomla.filesystem.folder' );
require_once JPATH_ROOT . '/components/com_xxxx/helper.php';

classname::functionname();

OR

If you are working on the same helper file means then call like this

classname::functionname();

answered Nov 20 '12 at 12:32

Mohammed Nagoor

884
2
12
25

This will work if he has set up his class correctly and defined them as static functions. – Cleanshooter Nov 20 '12 at 16:06

Joomla 2.5 cant use $this in helper file

2 Answers2