Disable Messages "Compose" Tab By Role.

yz-disable-messages-compose-tab-by-role.php

<?php

/**
 * # Disable Messages "Compose" Tab By Role.
 */
function yzc_remove_compose_message_page_by_role() {


    // Get Current User Data.
    $user = get_userdata( bp_loggedin_user_id() );

    // Get Roles.
    $roles = (array) $user->roles;

    if ( ! in_array( 'administrator', $roles ) || ! in_array( 'editor', $roles ) ) {
		bp_core_remove_subnav_item( 'messages', 'compose' );
	}
	
}

add_action( 'bp_setup_nav', 'yzc_remove_compose_message_page_by_role', 15 );