Title: PHP Error – Warning: call_user_func_array…
Last modified: August 22, 2016

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# PHP Error – Warning: call_user_func_array…

 *  [peter_o](https://wordpress.org/support/users/peter_o/)
 * (@peter_o)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/php-error-warning-call_user_func_array/)
 * Hi Joaquín, thanks for your great plugin! One of my customers has discovered 
   it, and she likes it. Now we tried it with another WP installation. When we go
   to “Settings” we got this PHP error:
 * Warning: call_user_func_array() [function.call-user-func-array]: First argument
   is expected to be a valid callback, ‘Easy_Wysiwyg_Style_Admin::build_ews_options_page’
   was given in /home/*****-com/htdocs/wp-includes/plugin.php on line 505
 * I have to say, this server is a bit “old-fashioned” (5.2.6-1+lenny9 / 32Bit OS),
   maybe that is a part of the problem. It would be great if you could give a hint
   to fix it.
 * Best, Peter
 * [https://wordpress.org/plugins/easy-wysiwyg-style/](https://wordpress.org/plugins/easy-wysiwyg-style/)

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## Tags

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

 * 0 replies
 * 1 participant
 * Last reply from: [peter_o](https://wordpress.org/support/users/peter_o/)
 * Last activity: [11 years, 5 months ago](https://wordpress.org/support/topic/php-error-warning-call_user_func_array/)
 * Status: not resolved