Hello,

Default Roles:

• Administrator: someone who has access to all the administrative features and functions within a site.
• Editor: someone who can publish and manage posts of all users, including their own.
• Author: someone who can publish and manage their own posts.
• Contributor: someone who can write and manage their own posts but can’t publish them.
• Subscriber: someone who can only manage their profile.

How to Add Custom User Role?

1. functions.php:

   
   <?php 
   // Add a custom user role
       $result = add_role( 'caylak', __(
           'Çaylak' ),
           array(
           'read' => true,                 // true allows this capability
           'edit_posts' => true,           // Allows user to edit their own posts
           'edit_pages' => true,           // Allows user to edit pages
           'edit_others_posts' => true,    // Allows user to edit others posts not just their own
           'create_posts' => true,         // Allows user to create new posts
           'manage_categories' => true,    // Allows user to manage post categories
           'publish_posts' => true,        // Allows the user to publish, otherwise posts stays in draft mode
           'edit_themes' => false,         // false denies this capability. User can’t edit your theme
           'install_plugins' => false,     // User cant add new plugins
           'update_plugin' => false,       // User can’t update any plugins
           'update_core' => false          // user cant perform core updates
           )
       );
   ?>
       

2. somewhere.php: // How to check if a user is in a specific role?

   
   <?php 
      $user = wp_get_current_user();
      if ( in_array( 'author', (array) $user->roles ) ) {
          //The user has the "author" role
      }
   ?>
       

3. somewhere.php: // If you want to check more than two roles, you can check if the roles of the current user is inside an array of roles, something like:

   
   <?php 
     $user = wp_get_current_user();
     $allowed_roles = array( 'editor', 'administrator', 'author' );
     if ( array_intersect( $allowed_roles, $user->roles ) ) {
        // Stuff here for allowed roles
     }
   ?>
       

4. Bonus: Security. Hide WP Dashboard Menu Items if user is not administrator.

   
   <?php 
       // Paneldeki Menuleri Gizle
       function my_remove_menu_items()
       {
           if (!current_user_can('administrator')):
               remove_menu_page('edit.php?post_type=cptslug');
               remove_menu_page('wpcf7');
               remove_menu_page('upload.php');
           endif;
       }
       add_action('admin_menu', 'my_remove_menu_items');
   ?>
       

Thanks:

• StackOverFlow
• WP Codex - Current_User_Can
• ManageWP