As stated in the title this code is working in my functions php file in the active child theme. I do not have much if anything installed as this is being developed in a vanilla WP installation.

here is the code I am using…

add_action('init', 'foo_add_rewrite_rule');
function foo_add_rewrite_rule(){
    add_rewrite_rule('^foobar?','index.php?is_foobar_page=1&post_type=custom_post_type','top');
    //Customize this query string - keep is_foobar_page=1 intact
}

add_action('query_vars','foo_set_query_var');
function foo_set_query_var($vars) {
    array_push($vars, 'is_foobar_page');
    return $vars;
}

add_filter('template_include', 'foo_include_template', 1000, 1);
function foo_include_template($template){
    if(get_query_var('is_foobar_page')){
        $new_template = WP_CONTENT_DIR.'/themes/your-theme/template-name.php';
        if(file_exists($new_template))
            $template = $new_template;
    }
    return $template;
}

this works perfect when in the the active child theme but when I move it out and into the plugin it fails.

i am using flush_rewrite_rules(); in the plugin and have disabled/enabled it to flush the rewrite rules.

I have set the constants to pull from the plugin directory in the templae function.

Can someone please tell me what I am missing?

Read more here: add_rewrite_rule works in themes function php but when moved into plugin it stops working


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