Use add_theme_page() func. in a class member function

Does add_theme_page() work if its not in your class? Or does it fail then too?

Yes, it does! It works very well, if it is in a simple function but whenever I place it inside my class member function I get the error.
How can I fix it??

Interesting. Can you post the line with the function call?

Also, add_theme_page looks like a wrapper to add_submenu_page with ‘themes.php’ as the first parameter. Does add_submenu_page work?

My class is in a separate php file in mytheme/functions/includes folder.
I include this php and my class in functions.php with include.
My class looks like this:

class myowntheme {
…

public function addThePage() {
add_theme_page($this->tname, $this->tname, ‘administrator’,’functions.php’, ‘mytheme_admin’);
}

..
}

And in functions.php I try to call it with an action:
add_action(‘admin_menu’,$classRepresentative->addThePage());

and after that I get the error…

What do I have to do?? Thanks for further help!

And I didn’t mention, that using add_submenu_page() throw same error…Any of these kind of functions didn’t work!

if the function is a method of a class within the plugin it should be referenced as array( $this, ‘function_name’ ). Try with this:

add_theme_page($this->tname, $this->tname, 'administrator','functions.php', array(&$this, 'mytheme_admin'));

keesiemeijer is right. From inside a class you are going to have to pass the callback function as an array. I think that’s the cause of your problem.

Many-many thanks for help! I’ll try it as soon as it’s possible and I’ll tell you if it works! Thanks once more!

I’ve tried your idea, but it didn’t work. In my example code below, you can see I reference the callback function as an array (as you recommended), but nothing happend…just the same error, what I got! The function themeUi is a public member function of my class as the addAdmin() function. Is there any solution?? Please help!

public function addAdmin() {
add_theme_page($this->tname, $this->tname, ‘administrator’,’functions.php’, array(&$this,’themeUi’));
}

Can you put the class in a pastebin, submit it and give us a link to it here.

Now, I’ve solved the original trouble I think with using this:

add_theme_page($this->tname, $this->tname, ‘administrator’,’functions.php’, $this->themeUi());

and using the add_action() function inside the class constructor. In this function both array(&$this,’addAdmin’) and $this->addAdmin() work well!
BUT a new misery occured while the theme option menu appears, because it is pointing to directly wp-admin/functions.php(it doesn’t exist in fact!!), and not to ?page=functions.php! Why? Can you help me?

And I paste the shortened code:
https://pastebin.com/7uQvdGMh

If I try this on my testserver with:

public function addAdmin() {
        add_theme_page($this->tname, $this->tname, 'administrator','functions.php', array(&$this,'themeUi'));
    }

I see “This will be the panel” on wp-admin/themes.php?page=functions.php

Ohh..finally!!! I was successfull with your solution! Thank you for your constant and enduring help! My final code looks like this:
https://pastebin.com/i5VLvrxF
I’ve used $this->addAdmin() before , but I changed it to your array(&$this,’addAdmin’)…I’ve tried it earlier, but it works only now…I don’t know why?! Maybe I missed something before, or I was just thoughtless.
Many Thanks once again!!!!!

You’re welcome, glad you got it resolved.