Reply To: Prevent bbpress Particapant role from creating topics

[Vladimir]

bbPress checks if user can create topic ising the function from the bbpress/includes/users/template.php, #2253

function bbp_current_user_can_access_create_topic_form() {

	// Users need to earn access
	$retval = false;

	// Always allow keymasters
	if ( bbp_is_user_keymaster() ) {
		$retval = true;

	// Looking at a single forum & forum is open
	} elseif ( ( bbp_is_single_forum() || is_page() || is_single() ) && bbp_is_forum_open() ) {
		$retval = bbp_current_user_can_publish_topics();

	// User can edit this topic
	} else {
		$retval = current_user_can( 'edit_topic', bbp_get_topic_id() );
	}

	// Filter & return
	return (bool) apply_filters( 'bbp_current_user_can_access_create_topic_form', (bool) $retval );
}

It shows that some time bbPress checks publish_topics, some times ‘edit_topics. But the good news that bbPress offers custom filter bbp_current_user_can_access_create_topic_form where you can check you own capability, like ‘create_topics’ and participant role will can not create topics until you will not grant ‘create_topics’ to it. Like below:

add_filter( 'bbp_current_user_can_access_create_topic_form', 'bbp_current_user_can_create_topic', 10, 1 );
function bbp_current_user_can_create_topic( $ret_val ) {
    $ret_val = current_user_can( 'create_topics' );
    
    return $ret_val;
}

You may add this code to the active theme’s functions.php file of or setup it as a Must Use plugin.