Add “custom page” without page

Question

The title might not be completely clear, but I didn\'t know how to ask this in another way.

I want to build a system in Wordpress where the user can put some projec

Answer 1

basically you can do this by creating a rewrite rule and then point to a file.

add_action('init', 'add_rewrite_rule');
   function add_rewrite_rule(){
   // add_rewrite_rule(REGEX url, location, priority (i.e. top is before other rewrite rules)
   //basically tell wordress to add a query var if sidebar is added to url. change sidebar to what you want your link to be.
   // i set up a custom post type to make this work called custompostype..it does nothing but just to give post_type a value. 
   add_rewrite_rule('^sidebar?','index.php?is_sidebar_page=1&post_type=customposttype','top');
}

// register a query var
add_action('query_vars','market_set_query_var');
function market_set_query_var($vars) {
   array_push($vars, 'is_sidebar_page');
   return $vars;
}

// associate a template with your quer_var 
add_filter('template_include', 'market_include_template', 1000, 1);
function market_include_template($template){
    if(get_query_var('is_sidebar_page')){
    $new_template = (theme or plugin path).'/pages/yourpage.php'; // change this path to your file 
if(file_exists($new_template))
    $template = $new_template;
} 
return $template;
}

after adding any rewrite rule, the changes wont take place until you go into settings->permalinks and hit the "save" button.