Title: Warning: call_user_func_array() expects parameter 1 to be a valid callback, func
Last modified: August 20, 2016

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# Warning: call_user_func_array() expects parameter 1 to be a valid callback, func

 *  [naqib83](https://wordpress.org/support/users/naqib83/)
 * (@naqib83)
 * [13 years, 7 months ago](https://wordpress.org/support/topic/warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-func/)
 * Hi,
    I have installed wordpress 3.4.2 in my localhost server. I am using wordpress
   theme “twentyten”. I am trying to create a chiled theme. I am creating custom
   menu. But when i tried to remove existing “primary” menu from it, this `Warning:
   call_user_func_array() expects parameter 1 to be a valid callback, function '
   tnc-remove_default_menu' not found or invalid function name in D:\xampp\htdocs\
   wordpress\wp-includes\plugin.php on line 403` showed up on my admin page. can
   anyone solve this problem??!!
 * Thanks,
    Naqib

Viewing 10 replies - 1 through 10 (of 10 total)

 *  [Max](https://wordpress.org/support/users/clementsm/)
 * (@clementsm)
 * [13 years, 7 months ago](https://wordpress.org/support/topic/warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-func/#post-3066026)
 * How are you removing the existing primary menu?
 *  [david.bailey](https://wordpress.org/support/users/davidbailey-1/)
 * (@davidbailey-1)
 * [13 years, 7 months ago](https://wordpress.org/support/topic/warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-func/#post-3066029)
 * It sounds like you’re removing the function without removing the call to the 
   function. I would recommend not removing the function at all and just remove 
   the call to the function. Do this by using the “remove_action” method – look 
   for the “add_action” that is adding the code, copy that, paste it into your functions.
   php and replace “add_action” with “remove_action” – that should do it.
 *  [adrianifero](https://wordpress.org/support/users/adrianifero/)
 * (@adrianifero)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-func/#post-3066195)
 * David is right, it is just a call to a function that no longer exists,
 * we have been solving this particular issue for a few clients, just locate that
   call (add_action for example) and remove it or comment it out.
 * See here for a more detailed explanation:
    [http://developer.infoymas.com/wordpress/warning-call_user_func_array-expects-parameter-1/](http://developer.infoymas.com/wordpress/warning-call_user_func_array-expects-parameter-1/)
 *  [pierrerodriguez](https://wordpress.org/support/users/pierrerodriguez/)
 * (@pierrerodriguez)
 * [13 years, 1 month ago](https://wordpress.org/support/topic/warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-func/#post-3066201)
 * Hello,
    I get an issue when I try to implement a custom menu. I get this issue:
   _Warning: call\_user\_func\_array() expects parameter 1 to be a valid callback,
   function ‘fb\_add\_search\_box’ not found or invalid function name in /homepages/
   41/d455375051/htdocs/wordpress/wordpress/wp-includes/plugin.php on line 173_
 * Do you have any idea to help me?
 * Thanks a lot,
 * Pierre
 *  [adrianifero](https://wordpress.org/support/users/adrianifero/)
 * (@adrianifero)
 * [13 years, 1 month ago](https://wordpress.org/support/topic/warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-func/#post-3066202)
 * Hello Pierre, in this case the same error is telling you where to look… The ‘
   fb_add_search_box’ doesn’t exists or was deleted on your functions, though producing
   this error,
 * Search trough the code where you’re defining the custom menu and find the reference
   for ‘fb_add_search_box’ and just delete it. you will probably not need this callback
   for a custom menu.
 * If you’re not sure what to do let me know more details about your menu code so
   I can help you
 *  [pierrerodriguez](https://wordpress.org/support/users/pierrerodriguez/)
 * (@pierrerodriguez)
 * [13 years ago](https://wordpress.org/support/topic/warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-func/#post-3066203)
 * Hello Adrian,
 * Thank you for your help! I thought to do it, but I was too lazy to search in 
   all files. I finally found it, and it works perfectly!
 * Have a nice day!
 * Pierre
 *  [adrianifero](https://wordpress.org/support/users/adrianifero/)
 * (@adrianifero)
 * [13 years ago](https://wordpress.org/support/topic/warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-func/#post-3066204)
 * Nice to hear Pierre!
 *  [mkassy](https://wordpress.org/support/users/mkassy/)
 * (@mkassy)
 * [13 years ago](https://wordpress.org/support/topic/warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-func/#post-3066206)
 * I have a similar problem. I am intermittently getting this error message:
 * Warning: call_user_func_array() expects parameter 1 to be a valid callback, function‘
   solostream_theme_js’ not found or invalid function name in /home/kassassi/public_html/
   wp-includes/plugin.php on line 403
 * How would I resolve this?
 *  [adrianifero](https://wordpress.org/support/users/adrianifero/)
 * (@adrianifero)
 * [13 years ago](https://wordpress.org/support/topic/warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-func/#post-3066207)
 * Hello mkassy, seems is the exact same problem that pierre had. You have to search
   on your functions.php file for the string ‘solostream_theme_js’, probably is 
   referring to a function that no longer exists.
 * If this is the case (you get only one string on the code), just set the callback
   empty (”) so the function doesn’t try to find ‘solostream_theme_js’ on every 
   page load
 *  [aarnold1](https://wordpress.org/support/users/aarnold1/)
 * (@aarnold1)
 * [12 years, 11 months ago](https://wordpress.org/support/topic/warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-func/#post-3066221)
 * Hi All, I just installed the plug in all in one seo professional on my site and
   when I actived it, this error now comes up.
 * Warning: call_user_func_array() expects parameter 1 to be a valid callback, function‘
   __return_true’ not found or invalid function name in /home2/massagei/public_html/
   wp-includes/plugin.php on line 166
 * Fatal error: Call to undefined function get_current_screen() in /home2/massagei/
   public_html/wp-content/plugins/all-in-one-seo-pack-pro/aioseop_module_class.php
   on line 622
 * I can’t even log in to the admin area and not really sure how to fix it even 
   after reading the above posts?
    thank you Adam

Viewing 10 replies - 1 through 10 (of 10 total)

The topic ‘Warning: call_user_func_array() expects parameter 1 to be a valid callback,
func’ is closed to new replies.

## Tags

 * [warning](https://wordpress.org/support/topic-tag/warning/)
 * [wordpress 3.4.2](https://wordpress.org/support/topic-tag/wordpress-3-4-2/)

 * 10 replies
 * 7 participants
 * Last reply from: [aarnold1](https://wordpress.org/support/users/aarnold1/)
 * Last activity: [12 years, 11 months ago](https://wordpress.org/support/topic/warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-func/#post-3066221)
 * Status: not resolved

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