Title: PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback Last modified: April 25, 2017 --- # PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback * Resolved [tomkirk23](https://wordpress.org/support/users/tomkirk23/) * (@tomkirk23) * [9 years, 1 month ago](https://wordpress.org/support/topic/php-warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-2/) * Hi: I am seeing the error message below. * PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘sa_cp_get_cart_count’ not found or invalid function name in /home/** removed**/public_html/**removed**/wp-includes/class-wp-hook.php on line 298 * I am using the Query Monitor plugin to help determine the cause. Query Monitor provides the Call Stack below and identifes the component as “Plugin: woocommerce- menu-bar-cart. * If I deactivate Woocommerce Menu Cart, the error message disappears. * Any thoughts? * Thanks! * Call Stack (obtained through Query Monitor plugin): * apply_filters(‘woocommerce_cart_contents_count’) wp-content/plugins/woocommerce/ includes/class-wc-cart.php:349 * WC_Cart->get_cart_contents_count() wp-content/plugins/woocommerce-menu-bar-cart/ includes/wpmenucart-woocommerce.php:32 * WPMenuCart_WooCommerce->menu_item() wp-content/plugins/woocommerce-menu-bar- cart/wp-menu-cart.php:429 * WpMenuCart->wpmenucart_menu_item() wp-content/plugins/woocommerce-menu-bar-cart/ wp-menu-cart.php:353 * WpMenuCart->add_itemcart_to_menu() wp-includes/class-wp-hook.php:298 * apply_filters(‘wp_nav_menu_shop_menu_items’) wp-includes/nav-menu-template.php: 231 * wp_nav_menu() wp-content/themes/genesis/lib/functions/menu.php:87 * genesis_get_nav_menu() wp-content/themes/genesis/lib/functions/menu.php:145 * genesis_nav_menu() wp-content/themes/genesis/lib/structure/menu.php:116 * genesis_do_subnav() wp-includes/class-wp-hook.php:298 * do_action(‘genesis_before_header’) wp-content/themes/genesis/header.php:33 * load_template(‘~/wp-content/themes/genesis/header.php’) wp-includes/template. php:643 * locate_template() wp-includes/general-template.php:45 * get_header() wp-content/themes/genesis/lib/framework.php:24 * genesis() wp-content/plugins/genesis-connect-woocommerce/templates/single-product. php:85 Viewing 5 replies - 1 through 5 (of 5 total) * Thread Starter [tomkirk23](https://wordpress.org/support/users/tomkirk23/) * (@tomkirk23) * [9 years, 1 month ago](https://wordpress.org/support/topic/php-warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-2/#post-9074882) * Hello? * Plugin Contributor [Darren Peyou](https://wordpress.org/support/users/dpeyou/) * (@dpeyou) * [9 years, 1 month ago](https://wordpress.org/support/topic/php-warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-2/#post-9091823) * Hi! * The `sa_cp_get_cart_count` function that is not found is not part of WP Menu Cart but hooked to a filter *used* by WP Menu Cart (`woocommerce_cart_contents_count`). That function is possibly either part of your theme or a custom function call in functions.php * Hope this bit of info helps you 🙂 * [wannaprasart](https://wordpress.org/support/users/wannaprasart/) * (@wannaprasart) * [8 years, 8 months ago](https://wordpress.org/support/topic/php-warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-2/#post-9526083) * . Warning:. Warning:class-wp-hook.php on line 298 . plugins **All Meta Tags** By Arthur Gareginyan . Warning: call_user_func_array() expects parameter 1 to be a valid callback, no array or string given in /home/www/web411/html/bjoern/ wp/wp-includes/class-wp-hook.php on line 298 . plugins **All Meta Tags** By Arthur Gareginyan . Warning: call_user_func_array() expects parameter 1 to be a valid callback, no array or string given in /home/www/web411/html/bjoern/wp/wp-includes/ class-wp-hook.php on line 298 . All Meta Tags, class-wp-hook * Plugin Contributor [Ewout](https://wordpress.org/support/users/pomegranate/) * (@pomegranate) * [8 years, 5 months ago](https://wordpress.org/support/topic/php-warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-2/#post-9785192) * [@wannaprasart](https://wordpress.org/support/users/wannaprasart/) This forum is for the plugin WooCommerce Menu Cart, you can find the support forumn for ** All Meta Tags** here: [https://wordpress.org/support/plugin/all-meta-tags](https://wordpress.org/support/plugin/all-meta-tags) * [palsri](https://wordpress.org/support/users/palsri/) * (@palsri) * [8 years, 3 months ago](https://wordpress.org/support/topic/php-warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-2/#post-10002341) * I am not getting the exact solution, but I got a temporary solution for immediate basis, just hide it, I use the function on the top of the file after ‘