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

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

 *  [snoopy15](https://wordpress.org/support/users/snoopy15/)
 * (@snoopy15)
 * [9 years, 11 months ago](https://wordpress.org/support/topic/warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-9/)
 * I don’t know how it happens and what causes this error, but I have it:
 * > Warning: call_user_func_array() expects parameter 1 to be a valid callback,
   > function ‘custom_override_checkout_fields’ not found or invalid function name
   > in /home/…/wp-includes/plugin.php on line 235
 * and line 235 looks like this
 *     ```
       foreach ( (array) current($wp_filter[$tag]) as $the_ )
         if ( !is_null($the_['function']) ){
           $args[1] = $value;
           $value = call_user_func_array($the_['function'], array_slice($args, 1, (int) $the_['accepted_args']));
       	}
       ```
   
 * I was browsing and every solution indicates that something is wrong with theme
   or plugin, but any solution didn’t help me how to figure out what is the problem.
 * Can somebody help me please?

The topic ‘Warning: call_user_func_array() expects parameter 1 to be a valid callback’
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## Tags

 * [php](https://wordpress.org/support/topic-tag/php/)
 * [warning](https://wordpress.org/support/topic-tag/warning/)
 * [wordpress-theme](https://wordpress.org/support/topic-tag/wordpress-theme/)

 * 0 replies
 * 1 participant
 * Last reply from: [snoopy15](https://wordpress.org/support/users/snoopy15/)
 * Last activity: [9 years, 11 months ago](https://wordpress.org/support/topic/warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-9/)
 * Status: not resolved

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