Title: WP_DEBUG – Strict Standards message
Last modified: August 21, 2016

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# WP_DEBUG – Strict Standards message

 *  [Clifford Paulick](https://wordpress.org/support/users/cliffpaulick/)
 * (@cliffpaulick)
 * [12 years ago](https://wordpress.org/support/topic/wp_debug-strict-standards-message/)
 * > Strict Standards: call_user_func_array() expects parameter 1 to be a valid 
   > callback, non-static method Facetious_Widget::register() should not be called
   > statically in /wp-includes/plugin.php on line 470
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 * 0 replies
 * 1 participant
 * Last reply from: [Clifford Paulick](https://wordpress.org/support/users/cliffpaulick/)
 * Last activity: [12 years ago](https://wordpress.org/support/topic/wp_debug-strict-standards-message/)
 * Status: not resolved