Ecommerce Shopify WordPress Discussion

Trouble with Custom Rewrite Rules in WordPress for Post Types and Categories

I'm working on a WordPress project where I need to create custom rewrite rules for various post types and their associated categories. The goal is to rewrite URLs in the format /post-type-slug/category/category-name/. However, I'm facing an issue where the post_type query variable is not being set as expected when the rewritten URL is accessed. Here's the relevant part of my code: add_action('init', function () { $postTypes = get_post_types(['public' => true, '_builtin' => false], 'objects'); foreach ($postTypes as $postType) { add_rewrite_rule( "{$postType->rewrite['slug']}/category/(.+)/?$", "index.php?post_type=\$matches[1]&category_name=\$matches[2]", 'top' ); } // flush_rewrite_rules(); // Uncommented during testing }); add_filter('template_include', function ($template) { var_dump(get_query_var('post_type')); // For debugging die; if (is_category() && get_query_var('post_type')) { $postType = get_query_var('post_type'); $customTemplate = locate_template("category-{$postType}.php"); if ($customTemplate) { return $customTemplate; } } return $template; }); Manual Rewrite Rules Flush: I've manually flushed the rewrite rules to ensure that the new rules are recognized by WordPress. This was done by uncommenting flush_rewrite_rules(); in the init action and also by visiting the "Settings > Permalinks" page in the WordPress admin area and saving the settings. Direct Query String Testing: To ensure that the issue was with the rewrite rule and not with query variable retrieval, I directly accessed a URL with query strings like This approach correctly set and retrieved the post_type query variable. Checking for Plugin/Theme Conflicts: I have tested this with all other plugins disabled and while using a default WordPress theme to rule out conflicts from other sources. Debugging with var_dump: I used var_dump(get_query_var('post_type')); within the template_include filter to debug the value of post_type. It consistently returns an empty string when accessing rewritten URLs, even though it works fine with direct query strings. Reviewing Custom Post Type Settings: I've confirmed that all custom post types involved are set to 'public' => true and '_builtin' => false, and that their rewrite slugs are correctly set up. Examining Global $wp_rewrite Object: I checked the global $wp_rewrite object to confirm that my rewrite rules were being added correctly. Regular Expression Validation: I validated the regular expressions used in add_rewrite_rule to ensure they correctly match the intended URL structure. Despite these efforts, the issue persists, and I'm unable to retrieve the post_type query variable from the rewritten URL. I'm looking for insights on what I might be missing or any alternative approaches to troubleshoot this further.
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