Title: Plugin creating PHP error Last modified: July 2, 2025 --- # Plugin creating PHP error * Resolved [webzang](https://wordpress.org/support/users/webzang/) * (@webzang) * [11 months, 1 week ago](https://wordpress.org/support/topic/plugin-creating-php-error/) * The plugin is causing a conflict and showing code on the product page as follows: * `Uncaught Error: Call to a member function get_meta() on string in /home/ravesfro/ public_html/wp-content/plugins/yith-pre-order-for-woocommerce/includes/class- yith-pre-order-product.php on line 69 Call stack: YITH_Pre_Order_Product::get_pre_order_status() wp-content/themes/raves/woocommerce/single-product/add-to-cart/variable.php:28 include('/home/ravesfro/publi...to-cart/variable.php') wp-content/plugins/woocommerce/ includes/wc-core-functions.php:346 wc_get_template() wp-content/plugins/woocommerce/ includes/wc-template-functions.php:1962 woocommerce_variable_add_to_cart() wp- includes/class-wp-hook.php:324 WP_Hook::apply_filters() wp-includes/class-wp- hook.php:348 WP_Hook::do_action() wp-includes/plugin.php:517 do_action() wp-content/ plugins/woocommerce/includes/wc-template-functions.php:1904 woocommerce_template_single_add_to_cart() wp-includes/class-wp-hook.php:324 WP_Hook::apply_filters() wp-includes/class- wp-hook.php:348 WP_Hook::do_action() wp-includes/plugin.php:517 do_action() wp- content/themes/raves/woocommerce/content-single-product.php:80 require('/home/ ravesfro/publi...t-single-product.php') wp-includes/template.php:812 load_template() wp-content/plugins/woocommerce/includes/wc-core-functions.php:285 wc_get_template_part() wp-content/themes/raves/woocommerce/single-product.php:29 include('/home/ravesfro/ publi...e/single-product.php') wp-includes/template-loader.php:106 require_once('/ home/ravesfro/publi.../template-loader.php') wp-blog-header.php:19 require('/ home/ravesfro/public_html/wp-blog-header.php') index.php:17` * we have tried switching to a default theme, deactivating other plugins and we have had to deactivate it as it looks so bad on the site. * Is this a known issue? Is there any patch before I switch to a different plugin? * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fplugin-creating-php-error%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 6 replies - 1 through 6 (of 6 total) * Plugin Support [Carlos M](https://wordpress.org/support/users/cjmora/) * (@cjmora) * [11 months, 1 week ago](https://wordpress.org/support/topic/plugin-creating-php-error/#post-18537685) * Hi [@webzang](https://wordpress.org/support/users/webzang/), The problem comes from this file from your “raves” theme:`_wp-content/themes/raves/woocommerce/ single-product/add-to-cart/variable.php_` * Maybe the problem isn’t related to Pre-Order but a bad practice on this template file within your theme. Is it possible to paste here in your next reply the content of the `variable.php` file, at least the lines surrounding line 28? Just to understand better what is being called there. * Thread Starter [webzang](https://wordpress.org/support/users/webzang/) * (@webzang) * [11 months, 1 week ago](https://wordpress.org/support/topic/plugin-creating-php-error/#post-18537686) * Hi * Thanks so much for your quick relpy. here is the first 37 lines from that theme file: * /** - Variable product add to cart * - This template can be overridden by copying it to yourtheme/woocommerce/single- product/add-to-cart/variable.php. * - HOWEVER, on occasion WooCommerce will need to update template files and you - (the theme developer) will need to copy the new files to your theme to - maintain compatibility. We try to do this as little as possible, but it does - happen. When this occurs the version of the template file will be bumped and - the readme will list any important changes. * - @see https://docs.woocommerce.com/document/template-structure/ - @package WooCommerce/Templates - @version 3.5.5 */ * defined( 'ABSPATH' ) || exit; * global $product; * $attribute_keys = array_keys( $attributes ); * foreach( $available_variations as $i => $variation ) { $id = $variation['variation_id']; if ( class_exists( 'YITH_Pre_Order_Product' ) ){$pre_order = new YITH_Pre_Order_Product( $id );if ( $pre_order->get_pre_order_status() == 'yes') {$available_variations[ $i]['availability_html'] = ' * Pre-order'; }}} * $variations_json = wp_json_encode( $available_variations ); $variations_attr = function_exists( 'wc_esc_json' ) ? wc_esc_json( $variations_json ) : _wp_specialchars( $variations_json, ENT_QUOTES, 'UTF-8', true ); * do_action( 'woocommerce_before_add_to_cart_form' ); * Plugin Support [Carlos M](https://wordpress.org/support/users/cjmora/) * (@cjmora) * [11 months, 1 week ago](https://wordpress.org/support/topic/plugin-creating-php-error/#post-18537803) * Hi [@webzang](https://wordpress.org/support/users/webzang/), Indeed, the problem is not from the Pre-Order plugin, but a custom code added to that template that uses functions of the Pre-Order plugin incorrectly.To fix the issue, replace this part: * ```wp-block-code foreach( $available_variations as $i => $variation ) { $id = $variation['variation_id']; if ( class_exists( 'YITH_Pre_Order_Product' ) ){ $pre_order = new YITH_Pre_Order_Product( $id ); if ( $pre_order->get_pre_order_status() == 'yes') { $available_variations[$i]['availability_html'] = 'Pre-order'; } }} ``` * with this: * ```wp-block-code if ( class_exists( 'YITH_Pre_Order_Utils' ) ) { foreach( $available_variations as $i => $variation ) { if ( $variation instanceof WC_Product && YITH_Pre_Order_Utils::is_pre_order_active( $variation ) ) { $available_variations[$i]['availability_html'] = 'Pre-order'; } }} ``` * Thread Starter [webzang](https://wordpress.org/support/users/webzang/) * (@webzang) * [11 months, 1 week ago](https://wordpress.org/support/topic/plugin-creating-php-error/#post-18538183) * This worked really well great. is there a way to remove the gap between the “ expected” date and variation descriptions? See [https://ravesfromthegrave.com/shop/beneath-strawberry-moons/](https://ravesfromthegrave.com/shop/beneath-strawberry-moons/) * ![](https://i0.wp.com/ravesfromthegrave.com/wp-content/uploads/2025/07/Screenshot- 2025-07-02-at-16.37.25.jpg?ssl=1) * Plugin Support [Carlos M](https://wordpress.org/support/users/cjmora/) * (@cjmora) * [11 months, 1 week ago](https://wordpress.org/support/topic/plugin-creating-php-error/#post-18538192) * Hi [@webzang](https://wordpress.org/support/users/webzang/), A CSS code like this should remove the gap: * ```wp-block-code .ywpo_availability_date.pre_order_single-no-auto-format { margin-bottom: 0px !important;} ``` * Thread Starter [webzang](https://wordpress.org/support/users/webzang/) * (@webzang) * [11 months, 1 week ago](https://wordpress.org/support/topic/plugin-creating-php-error/#post-18538275) * Thanks so much this fixed it! Much appreciated. Viewing 6 replies - 1 through 6 (of 6 total) The topic ‘Plugin creating PHP error’ is closed to new replies. * ![](https://ps.w.org/yith-pre-order-for-woocommerce/assets/icon.svg?rev=3307139) * [YITH Pre-Order for WooCommerce](https://wordpress.org/plugins/yith-pre-order-for-woocommerce/) * [Frequently Asked Questions](https://wordpress.org/plugins/yith-pre-order-for-woocommerce/#faq) * [Support Threads](https://wordpress.org/support/plugin/yith-pre-order-for-woocommerce/) * [Active Topics](https://wordpress.org/support/plugin/yith-pre-order-for-woocommerce/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/yith-pre-order-for-woocommerce/unresolved/) * [Reviews](https://wordpress.org/support/plugin/yith-pre-order-for-woocommerce/reviews/) ## Tags * [php-error](https://wordpress.org/support/topic-tag/php-error/) * 6 replies * 2 participants * Last reply from: [webzang](https://wordpress.org/support/users/webzang/) * Last activity: [11 months, 1 week ago](https://wordpress.org/support/topic/plugin-creating-php-error/#post-18538275) * Status: resolved