Title: PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback, Last modified: June 27, 2019 --- # PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback, * [Mohammad Javed](https://wordpress.org/support/users/digitljaved/) * (@digitljaved) * [6 years, 11 months ago](https://wordpress.org/support/topic/php-warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-5/) * Hello, * I get the following error/warning; * `PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback, class 'Storefront' does not have a method 'child_scripts' in /public_html/wp- includes/class-wp-hook.php on line 286` * The product filtering by capacity doesn’t work for this category for some reason. The same site and files are on 3 other servers and it works fine, the site is on Cloudways and the filtering by capacity on the page in question does not work. I’m at loss in how I can resolve this problem. * Site info below; * ``` ### wp-core ### version: 5.2.2 site_language: en_GB user_language: en_GB permalink: /blog/%postname%/ https_status: true user_registration: 0 default_comment_status: closed multisite: false user_count: 6 dotorg_communication: true ### wp-paths-sizes ### wordpress_path: /public_html wordpress_size: 181.90 MB (190736190 bytes) uploads_path: /public_html/wp-content/uploads uploads_size: 2.23 GB (2392727395 bytes) themes_path: /public_html/wp-content/themes themes_size: 14.93 MB (15651266 bytes) plugins_path: /public_html/wp-content/plugins plugins_size: 151.81 MB (159187740 bytes) database_size: 43.21 MB (45311208 bytes) total_size: 2.61 GB (2803613799 bytes) ### wp-active-theme ### name: storefront-child version: 2.2.4 author: WooThemes author_website: https://woocommerce.com/ parent_theme: Storefront theme_features: post-thumbnails, automatic-feed-links, custom-logo, menus, html5, custom-background, site-logo, woocommerce, wc-product-gallery-zoom, wc-product-gallery-lightbox, wc-product-gallery-slider, title-tag, customize-selective-refresh-widgets, custom-header, starter-content, widgets theme_path: /public_html/wp-content/themes/storefront ### wp-themes (1) ### Storefront: version: 2.2.4, author: WooThemes (latest version: 2.5.0) ### wp-plugins-active (21) ### Advanced Custom Fields: version: 5.8.1, author: Elliot Condon Advanced Custom Fields PRO: version: 5.8.1, author: Elliot Condon Categories Images: version: 2.5.4, author: Muhammad Said El Zahlan Disable Gutenberg: version: 1.8.1, author: Jeff Starr Filename-based asset cache busting: version: 1.3, author: Ben Lumley Google Tag Manager for WordPress: version: 1.9.2, author: Thomas Geiger JivoChat: version: 1.3.3, author: JivoChat Mailchimp for WordPress: version: 4.5.2, author: ibericode Ninja Forms: version: 3.4.16, author: The WP Ninjas Premmerce Permalink Manager for WooCommerce: version: 2.1.9, author: premmerce (latest version: 2.1.11) Redirection: version: 4.3.1, author: John Godley Regenerate Thumbnails: version: 3.1.1, author: Alex Mills (Viper007Bond) Simple Custom Post Order: version: 2.4.4, author: Colorlib SVG Support: version: 2.3.15, author: Benbodhi TAO Schedule Update: version: 1.15, author: TAO Digital Tweetlab: version: 2.0.2, author: MaGeek Lab WooCommerce: version: 3.6.4, author: Automattic WordPress Importer: version: 0.6.4, author: wordpressdotorg WP Media Category Management: version: 1.9.4, author: DeBAAT YITH WooCommerce Catalog Mode: version: 1.6.9, author: YITH Yoast SEO: version: 11.4, author: Team Yoast (latest version: 11.5) ### wp-plugins-inactive (8) ### Akismet Anti-Spam: version: 4.1.2, author: Automattic Autoptimize: version: 2.5.1, author: Frank Goossens (futtta) Category and Taxonomy Meta Fields: version: 1.0.0, author: Aftab Husain Lazy Loader: version: 4.1.0, author: Florian Brinkmann, MarcDK Smush: version: 3.2.1, author: WPMU DEV W3 Total Cache: version: 0.9.7.5, author: Frederick Townes WooCommerce Admin: version: 0.14.0, author: WooCommerce Wordfence Security: version: 7.3.4, author: Wordfence ### wp-media ### image_editor: WP_Image_Editor_Imagick imagick_module_version: 1673 imagemagick_version: ImageMagick 6.8.9-9 Q16 x86_64 2019-05-13 http://www.imagemagick.org imagick_limits: imagick::RESOURCETYPE_AREA: 4 GB imagick::RESOURCETYPE_DISK: -1 imagick::RESOURCETYPE_FILE: 768 imagick::RESOURCETYPE_MAP: 4 GB imagick::RESOURCETYPE_MEMORY: 2 GB imagick::RESOURCETYPE_THREAD: 1 gd_version: 2.2.5 ghostscript_version: 9.26 ### wp-server ### server_architecture: Linux 3.16.0-7-amd64 x86_64 httpd_software: Apache/2.4.10 (Debian) php_version: 7.2.14-1+0~20190113100657.14+jessie~1.gbpd83c69 64bit php_sapi: fpm-fcgi max_input_variables: 2500 time_limit: 60 memory_limit: 256M max_input_time: 60 upload_max_size: 10M php_post_max_size: 10M curl_version: 7.38.0 OpenSSL/1.0.1t suhosin: false imagick_availability: true htaccess_extra_rules: true ### wp-database ### extension: mysqli server_version: 5.5.62-0+deb8u1 client_version: mysqlnd 5.0.12-dev - 20150407 - $Id: 38fea24f2847fa7519001be390c98ae0acafe387 $ ### wp-constants ### WP_HOME: https://www.tuffa.co.uk WP_SITEURL: https://www.tuffa.co.uk WP_CONTENT_DIR: /public_html/wp-content WP_PLUGIN_DIR: /public_html/wp-content/plugins WP_MAX_MEMORY_LIMIT: 256M WP_DEBUG: false WP_DEBUG_DISPLAY: true WP_DEBUG_LOG: false SCRIPT_DEBUG: false WP_CACHE: false CONCATENATE_SCRIPTS: undefined COMPRESS_SCRIPTS: undefined COMPRESS_CSS: undefined WP_LOCAL_DEV: undefined ### wp-filesystem ### wordpress: writable wp-content: writable uploads: writable plugins: writable themes: writable ``` * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fphp-warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-5%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 8 replies - 1 through 8 (of 8 total) * [Ryan Ray](https://wordpress.org/support/users/ryanr14/) * (@ryanr14) * [6 years, 11 months ago](https://wordpress.org/support/topic/php-warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-5/#post-11683813) * Hi [@digitljaved](https://wordpress.org/support/users/digitljaved/), * That seems like something in the child theme is causing issues, but I also see that Storefront is pretty out of date. * Your version is 2.2.4 and the lastest version is 2.5.0. 🙂 * Nonetheless, the problem you mentioned… * > The product filtering by capacity doesn’t work for this category for some reason. > The same site and files are on 3 other servers and it works fine, the site > is on Cloudways and the filtering by capacity on the page in question does > not work. I’m at loss in how I can resolve this problem. * Just to clarify, looking at the URL you shared you are saying you aren’t able to use these two dropdowns? I ask as I was able change the options in those two dropdowns? * Link to image: [https://cld.wthms.co/RB9wgo](https://cld.wthms.co/RB9wgo) * Thread Starter [Mohammad Javed](https://wordpress.org/support/users/digitljaved/) * (@digitljaved) * [6 years, 11 months ago](https://wordpress.org/support/topic/php-warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-5/#post-11687755) * Hi Ryan, * I know the theme is quite outdated, it needs updating, I’ve tried this and there are loads of breaking changes. * The dropdowns are accessible if you filter the products by capacity only it does not work, but if you go to another category the capacity filtering works perfectly. * I’m baffled that this works on 3 other servers and the server it’s hosted on is where this filtering problem has appeared. * I’m not sure what to even do, it might be that we need to update the theme to the latest version possible and see if the capacity filtering works on that category in question. * Thank you, J * [Ryan Ray](https://wordpress.org/support/users/ryanr14/) * (@ryanr14) * [6 years, 11 months ago](https://wordpress.org/support/topic/php-warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-5/#post-11693399) * Hi [@digitljaved](https://wordpress.org/support/users/digitljaved/), * Hmm, that’s interesting. The very same setup works on other servers? For a real quick check, can you also post your system status from WooCommerce? One thing I’d be looking for in that is that your database version matches the version of WooCommerce on the site. * You can find it via WooCommerce > Status. Select “Get system report” and then“ Copy for support”. Once you’ve done that, paste it here in your response. * Also, for clarification, how has that filtering been added to what looks like product category pages? - This reply was modified 6 years, 11 months ago by [Ryan Ray](https://wordpress.org/support/users/ryanr14/). * Thread Starter [Mohammad Javed](https://wordpress.org/support/users/digitljaved/) * (@digitljaved) * [6 years, 11 months ago](https://wordpress.org/support/topic/php-warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-5/#post-11695648) * Hi [@ryanr14](https://wordpress.org/support/users/ryanr14/) * The filtering has been added in through the functions file. We’ve not developed the website, we’ve just inherited it so don’t know the ins and outs of the site completely. * Here is the requested information. * ``` ### WordPress Environment ### WordPress address (URL): https://www.tuffa.co.uk Site address (URL): https://www.tuffa.co.uk WC Version: 3.6.4 Log Directory Writable: ✔ WP Version: 5.2.2 WP Multisite: – WP Memory Limit: 256 MB WP Debug Mode: – WP Cron: ✔ Language: en_GB External object cache: – ### Server Environment ### Server Info: Apache/2.4.10 (Debian) PHP Version: 7.2.14-1+0~20190113100657.14+jessie~1.gbpd83c69 PHP Post Max Size: 10 MB PHP Time Limit: 60 PHP Max Input Vars: 2500 cURL Version: 7.38.0 OpenSSL/1.0.1t SUHOSIN Installed: – MySQL Version: ❌ 5.5.62-0+deb8u1 - We recommend a minimum MySQL version of 5.6. See: WordPress requirements Max Upload Size: 10 MB Default Timezone is UTC: ✔ fsockopen/cURL: ✔ SoapClient: ✔ DOMDocument: ✔ GZip: ✔ Multibyte String: ✔ Remote Post: ✔ Remote Get: ✔ ### Database ### WC Database Version: 3.6.4 WC Database Prefix: wp_ MaxMind GeoIP Database: ✔ Total Database Size: 44.52MB Database Data Size: 35.87MB Database Index Size: 8.65MB wp_woocommerce_sessions: Data: 0.01MB + Index: 0.00MB wp_woocommerce_api_keys: Data: 0.00MB + Index: 0.00MB wp_woocommerce_attribute_taxonomies: Data: 0.00MB + Index: 0.00MB wp_woocommerce_downloadable_product_permissions: Data: 0.00MB + Index: 0.00MB wp_woocommerce_order_items: Data: 0.00MB + Index: 0.00MB wp_woocommerce_order_itemmeta: Data: 0.00MB + Index: 0.00MB wp_woocommerce_tax_rates: Data: 0.00MB + Index: 0.01MB wp_woocommerce_tax_rate_locations: Data: 0.00MB + Index: 0.00MB wp_woocommerce_shipping_zones: Data: 0.00MB + Index: 0.00MB wp_woocommerce_shipping_zone_locations: Data: 0.00MB + Index: 0.00MB wp_woocommerce_shipping_zone_methods: Data: 0.00MB + Index: 0.00MB wp_woocommerce_payment_tokens: Data: 0.00MB + Index: 0.00MB wp_woocommerce_payment_tokenmeta: Data: 0.00MB + Index: 0.00MB wp_woocommerce_log: Data: 0.00MB + Index: 0.00MB wp_commentmeta: Data: 0.02MB + Index: 0.03MB wp_comments: Data: 0.08MB + Index: 0.09MB wp_links: Data: 0.02MB + Index: 0.02MB wp_litespeed_optimizer: Data: 0.00MB + Index: 0.00MB wp_nf3_actions: Data: 0.02MB + Index: 0.00MB wp_nf3_action_meta: Data: 0.05MB + Index: 0.00MB wp_nf3_chunks: Data: 0.02MB + Index: 0.00MB wp_nf3_fields: Data: 0.02MB + Index: 0.00MB wp_nf3_field_meta: Data: 0.09MB + Index: 0.00MB wp_nf3_forms: Data: 0.02MB + Index: 0.00MB wp_nf3_form_meta: Data: 0.02MB + Index: 0.00MB wp_nf3_objects: Data: 0.02MB + Index: 0.00MB wp_nf3_object_meta: Data: 0.02MB + Index: 0.00MB wp_nf3_relationships: Data: 0.02MB + Index: 0.00MB wp_nf3_upgrades: Data: 0.02MB + Index: 0.00MB wp_options: Data: 4.22MB + Index: 0.08MB wp_postmeta: Data: 16.52MB + Index: 5.97MB wp_posts: Data: 12.52MB + Index: 1.06MB wp_redirection_404: Data: 0.69MB + Index: 0.36MB wp_redirection_groups: Data: 0.00MB + Index: 0.00MB wp_redirection_items: Data: 0.01MB + Index: 0.01MB wp_redirection_logs: Data: 0.03MB + Index: 0.02MB wp_smush_dir_images: Data: 0.00MB + Index: 0.00MB wp_termmeta: Data: 0.08MB + Index: 0.03MB wp_terms: Data: 0.05MB + Index: 0.03MB wp_termsmeta: Data: 0.00MB + Index: 0.01MB wp_term_relationships: Data: 0.16MB + Index: 0.14MB wp_term_taxonomy: Data: 0.16MB + Index: 0.03MB wp_usermeta: Data: 0.11MB + Index: 0.03MB wp_users: Data: 0.02MB + Index: 0.05MB wp_wc_admin_notes: Data: 0.02MB + Index: 0.00MB wp_wc_admin_note_actions: Data: 0.02MB + Index: 0.02MB wp_wc_customer_lookup: Data: 0.02MB + Index: 0.03MB wp_wc_download_log: Data: 0.02MB + Index: 0.03MB wp_wc_order_coupon_lookup: Data: 0.02MB + Index: 0.03MB wp_wc_order_product_lookup: Data: 0.02MB + Index: 0.06MB wp_wc_order_stats: Data: 0.02MB + Index: 0.05MB wp_wc_order_tax_lookup: Data: 0.02MB + Index: 0.03MB wp_wc_product_meta_lookup: Data: 0.05MB + Index: 0.09MB wp_wc_webhooks: Data: 0.02MB + Index: 0.02MB wp_wfbadleechers: Data: 0.02MB + Index: 0.00MB wp_wfblockediplog: Data: 0.02MB + Index: 0.00MB wp_wfblocks: Data: 0.02MB + Index: 0.02MB wp_wfblocksadv: Data: 0.02MB + Index: 0.00MB wp_wfconfig: Data: 0.02MB + Index: 0.00MB wp_wfcrawlers: Data: 0.02MB + Index: 0.00MB wp_wffilemods: Data: 0.02MB + Index: 0.00MB wp_wfhits: Data: 0.02MB + Index: 0.05MB wp_wfhoover: Data: 0.02MB + Index: 0.02MB wp_wfissues: Data: 0.02MB + Index: 0.00MB wp_wfknownfilelist: Data: 0.02MB + Index: 0.00MB wp_wfleechers: Data: 0.02MB + Index: 0.00MB wp_wflockedout: Data: 0.02MB + Index: 0.00MB wp_wflocs: Data: 0.02MB + Index: 0.00MB wp_wflogins: Data: 0.02MB + Index: 0.03MB wp_wfnet404s: Data: 0.02MB + Index: 0.02MB wp_wfnotifications: Data: 0.02MB + Index: 0.00MB wp_wfpendingissues: Data: 0.02MB + Index: 0.00MB wp_wfreversecache: Data: 0.02MB + Index: 0.00MB wp_wfscanners: Data: 0.02MB + Index: 0.00MB wp_wfsnipcache: Data: 0.02MB + Index: 0.05MB wp_wfstatus: Data: 0.02MB + Index: 0.03MB wp_wfthrottlelog: Data: 0.02MB + Index: 0.02MB wp_wfvulnscanners: Data: 0.02MB + Index: 0.00MB wp_yoast_seo_links: Data: 0.09MB + Index: 0.03MB wp_yoast_seo_meta: Data: 0.05MB + Index: 0.05MB ### Post Type Counts ### acf-field: 59 acf-field-group: 4 attachment: 1845 custom_css: 1 faq: 41 mc4wp-form: 1 nav_menu_item: 75 nf_sub: 615 oembed_cache: 1 page: 34 post: 368 product: 280 product_variation: 6 revision: 1865 scheduled-action: 104 ### Security ### Secure connection (HTTPS): ✔ Hide errors from visitors: ✔ ### Active Plugins (21) ### Advanced Custom Fields PRO: by Elliot Condon – 5.8.1 Advanced Custom Fields: by Elliot Condon – 5.8.1 Categories Images: by Muhammad Said El Zahlan – 2.5.4 Disable Gutenberg: by Jeff Starr – 1.8.1 Google Tag Manager for WordPress: by Thomas Geiger – 1.9.2 – Not tested with the active version of WooCommerce Filename-based asset cache busting: by Ben Lumley – 1.3 JivoChat: by JivoChat – 1.3.3 Mailchimp for WordPress: by ibericode – 4.5.2 Ninja Forms: by The WP Ninjas – 3.4.16 Redirection: by John Godley – 4.3.1 Regenerate Thumbnails: by Alex Mills (Viper007Bond) – 3.1.1 Simple Custom Post Order: by Colorlib – 2.4.4 SVG Support: by Benbodhi – 2.3.15 TAO Schedule Update: by TAO Digital – 1.15 Tweetlab: by MaGeek Lab – 2.0.2 Premmerce Permalink Manager for WooCommerce: by premmerce – 2.1.9 WooCommerce: by Automattic – 3.6.4 – 3.6.5 is available WordPress Importer: by wordpressdotorg – 0.6.4 Yoast SEO: by Team Yoast – 11.4 – Not tested with the active version of WooCommerce WP Media Category Management: by DeBAAT – 1.9.4 YITH WooCommerce Catalog Mode: by YITH – 1.6.9 ### Inactive Plugins (8) ### Akismet Anti-Spam: by Automattic – 4.1.2 Autoptimize: by Frank Goossens (futtta) – 2.5.1 Category and Taxonomy Meta Fields: by Aftab Husain – 1.0.0 Lazy Loader: by Florian Brinkmann MarcDK – 4.1.0 Smush: by WPMU DEV – 3.2.1 W3 Total Cache: by Frederick Townes – 0.9.7.5 WooCommerce Admin: by WooCommerce – 0.14.0 Wordfence Security: by Wordfence – 7.3.4 ### Settings ### API Enabled: ✔ Force SSL: – Currency: GBP (£) Currency Position: left Thousand Separator: , Decimal Separator: . Number of Decimals: 2 Taxonomies: Product Types: external (external) grouped (grouped) simple (simple) variable (variable) Taxonomies: Product Visibility: exclude-from-catalog (exclude-from-catalog) exclude-from-search (exclude-from-search) featured (featured) outofstock (outofstock) rated-1 (rated-1) rated-2 (rated-2) rated-3 (rated-3) rated-4 (rated-4) rated-5 (rated-5) Connected to WooCommerce.com: – ### WC Pages ### Shop base: #4 - /shop/ Basket: #5 - /cart/ Checkout: #6 - /checkout/ My account: #7 - /my-account/ Terms and conditions: ❌ Page not set ### Theme ### Name: storefront-child Version: 2.2.4 Author URL: https://woocommerce.com/ Child Theme: ✔ Parent Theme Name: Storefront Parent Theme Version: 2.2.4 – 2.5.0 is available Parent Theme Author URL: https://woocommerce.com/ WooCommerce Support: ✔ ### Templates ### Overrides: storefront-child/woocommerce/archive-product.php version 2.0.0 is out of date. The core version is 3.4.0 storefront-child/woocommerce/global/breadcrumb.php storefront-child/woocommerce/loop/orderby.php version 2.2.0 is out of date. The core version is 3.6.0 storefront-child/woocommerce/single-product/product-attributes.php version 3.1.0 is out of date. The core version is 3.6.0 storefront-child/woocommerce/single-product/related.php storefront-child/woocommerce/single-product/short-description.php version 1.6.4 is out of date. The core version is 3.3.0 storefront-child/woocommerce/single-product/tabs/tabs.php storefront-child/woocommerce/single-product/title.php storefront-child/woocommerce/single-product/up-sells.php Outdated Templates: ❌ Learn how to update ### Action Scheduler ### Complete: 103 Oldest: 2019-06-17 10:04:06 +0000 Newest: 2019-06-26 11:29:54 +0000 Pending: 0 Oldest: – Newest: – Canceled: 1 Oldest: 2019-06-26 12:29:54 +0000 Newest: 2019-06-26 12:29:54 +0000 In-progress: 0 Oldest: – Newest: – Failed: 0 Oldest: – Newest: – ``` * Let me know if there is anything else you need me to check or provide to you. * Thanks, Javed * Thread Starter [Mohammad Javed](https://wordpress.org/support/users/digitljaved/) * (@digitljaved) * [6 years, 11 months ago](https://wordpress.org/support/topic/php-warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-5/#post-11717739) * Hi [@ryanr14](https://wordpress.org/support/users/ryanr14/) * Do we have any updates on this? * Thanks, Javed * Thread Starter [Mohammad Javed](https://wordpress.org/support/users/digitljaved/) * (@digitljaved) * [6 years, 11 months ago](https://wordpress.org/support/topic/php-warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-5/#post-11759968) * Hi [@ryanr14](https://wordpress.org/support/users/ryanr14/) * We’ve noticed that the code base has changed and the way the product attribute data is being saved into the database. * Due to this code change, the filtering has stopped working, you’ll notice that it’s working on other categories, the reason for this is because the product has not been saved so the way it stored the data in the database has not updated. Once you save the product without making any changes it stores the data different to the state that it was currently in. There has been an update somewhere that has made the codebase change and the way data is being stored in the database. If you need me to set up a staging environment of the website, I can do this for you so you can debug this? * It’s changed the filters from a meta value to a term, when looking in the database it’s serializing the data. Instead of storing the attribute value against a meta_key it now stores a serialised reference to a term * Does that make any sense to you? * I look forward to hearing from you. * Thank you, Javed * Thread Starter [Mohammad Javed](https://wordpress.org/support/users/digitljaved/) * (@digitljaved) * [6 years, 11 months ago](https://wordpress.org/support/topic/php-warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-5/#post-11760049) * [@ryanr14](https://wordpress.org/support/users/ryanr14/) * Here are the functions for the filtering that is located in setup.php in the functions folder situated in the child theme; * ``` /* Add sorting by attributes */ /** * Defines the criteria for sorting with options defined in the method below */ add_filter( 'woocommerce_get_catalog_ordering_args', 'custom_woocommerce_get_catalog_ordering_args' ); function custom_woocommerce_get_catalog_ordering_args($args) { global $wp_query; if ($_GET['orderby']) { $orderby_value = $_GET['orderby']; } else { $term = get_queried_object(); $children = get_terms($term->taxonomy, array( 'parent' => $term->term_id, 'hide_empty' => false )); if(!$children){ $orderby_value = apply_filters('woocommerce_default_catalog_orderby', get_option('woocommerce_default_catalog_orderby')); }else{ $orderby_value = ''; // apply_filters('woocommerce_default_catalog_orderby', get_option('woocommerce_default_catalog_orderby')) } } $args = null; if(array_sum (check_capacity()) > 0){ if ('pa_capacity_asc' == $orderby_value) { $args['orderby'] = 'meta_value_num'; $args['order'] = 'asc'; $args['meta_key'] = 'pa_capacity'; } else if ('pa_capacity_desc' == $orderby_value) { $args['orderby'] = 'meta_value_num'; $args['order'] = 'desc'; $args['meta_key'] = 'pa_capacity'; } } return $args; } function check_capacity(){ global $wp_query; $out = []; $curr_cat_id = $wp_query->get_queried_object()->term_id; $args = array( 'post_type' => 'product', 'posts_per_page' => -1, 'tax_query' => array( 'relation' => 'AND', array( 'taxonomy' => 'product_cat', 'field' => 'term_id', 'terms' => $curr_cat_id ) ), ); $loop = new WP_Query($args); if ($loop->have_posts()): while ($loop->have_posts()): $loop->the_post(); global $product; $koostis = array_shift(wc_get_product_terms(get_the_ID(), 'pa_capacity', array('fields' => 'names'))); $out[get_the_ID()] = $koostis; endwhile; endif; wp_reset_postdata(); return($out); } add_filter( 'woocommerce_default_catalog_orderby_options', 'custom_woocommerce_catalog_orderby' ); /** * Adds the sorting options to dropdown list .. The logic/criteria is in the method above */ add_filter( 'woocommerce_catalog_orderby', 'custom_woocommerce_catalog_orderby' ); function custom_woocommerce_catalog_orderby( $sortby ) { $sortby['pa_capacity_asc'] = 'Sort by Capacity (Asc)'; $sortby['pa_capacity_desc'] = 'Sort by Capacity (Desc)'; return $sortby; } /** * Save custom attributes as post's meta data as well so that we can use in sorting and searching */ add_action( 'save_post', 'save_woocommerce_attr_to_meta' ); function save_woocommerce_attr_to_meta( $post_id ) { $post_type = get_post_type($post_id); // If this isn't a 'product' post, don't update it. if ($post_type != 'product') return; // If attribute name and value exist if (!empty($_POST['attribute_names']) && !empty($_POST['attribute_values'])) { $attribute_names = $_POST['attribute_names']; $attribute_values = $_POST['attribute_values']; // Add post meta data for each attribute foreach( $attribute_names as $index => $attribute_name ) { update_post_meta( $post_id, $attribute_name, $attribute_values[$index] ); } } } ``` * Thread Starter [Mohammad Javed](https://wordpress.org/support/users/digitljaved/) * (@digitljaved) * [6 years, 11 months ago](https://wordpress.org/support/topic/php-warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-5/#post-11770974) * Have a look at these images too [@ryanr14](https://wordpress.org/support/users/ryanr14/) * [SCREENSHOTS](https://imgur.com/a/0lUabLs) * The first image shows how the attribute data is being stored in the database with the latest version of WooCommerce & WordPress. * The second image shows how the attribute USE TO BE stored in the database. * Let me know how we can sort this out. Thank you. Viewing 8 replies - 1 through 8 (of 8 total) The topic ‘PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback,’ is closed to new replies. * ![](https://i0.wp.com/themes.svn.wordpress.org/storefront/4.6.2/screenshot.png) * Storefront * [Support Threads](https://wordpress.org/support/theme/storefront/) * [Active Topics](https://wordpress.org/support/theme/storefront/active/) * [Unresolved Topics](https://wordpress.org/support/theme/storefront/unresolved/) * [Reviews](https://wordpress.org/support/theme/storefront/reviews/) ## Tags * [attributes](https://wordpress.org/support/topic-tag/attributes/) * [filtering](https://wordpress.org/support/topic-tag/filtering/) * [products](https://wordpress.org/support/topic-tag/products/) * 8 replies * 2 participants * Last reply from: [Mohammad Javed](https://wordpress.org/support/users/digitljaved/) * Last activity: [6 years, 11 months ago](https://wordpress.org/support/topic/php-warning-call_user_func_array-expects-parameter-1-to-be-a-valid-callback-5/#post-11770974) * Status: not resolved