我想在 woocommerce 产品的 wordpress 帖子中添加自定义元键和元值。我有这样的代码:
global $wpdb;
$post_id = $wpdb->get_var( "SELECT ID FROM $wpdb->posts ORDER BY ID DESC LIMIT 1" );
add_post_meta($post_id, 'offers_for_woocommerce_enabled', 'yes’, true);
add_post_meta($post_id, 'woo_ua_product_condition', 'used', true);
add_post_meta($post_id, 'woo_ua_opening_price', 1, true);
add_post_meta($post_id, 'woo_ua_lowest_price', 2, true);
我收到了错误:解析错误:语法错误,意外'woo_ua_product_condition'(T_STRING),期待')'在......
请帮忙