WP URL Rewrite Sample

request.php

<?php
class Request {
	
	public static $pagename = null;
	public static $module = null;
	public static $action_page = null;
	public static $action_id = null;
	
	public static $app_slug = null;	
    
    public function __construct() {
        add_action( 'init', [ $this, 'setup_rewrite_rule' ] );        
        add_action( 'parse_request', [ $this, 'app_parse_request' ] );   
        add_action( 'template_redirect', [ $this, 'redirect_page' ] );
    }
	
	public function setup_rewrite_rule() {
        add_rewrite_tag( '%module%', '([A-Za-z0-9\-\_]+)' );
        add_rewrite_tag( '%action_page%', '([A-Za-z0-9\-\_]+)' );
        add_rewrite_tag( '%action_id%', '([A-Za-z0-9\-\_]+)' );                                    
        
        $app_page = get_option( 'options_app_page', '' );
        if( $app_page != '' ) {
		    $_post = get_post( $app_page );
		    
		    $_app_slug = $_post->post_name;
		    self::$app_slug = $_app_slug;
		    
		    add_rewrite_rule( '^'.$_app_slug.'/([A-Za-z0-9\-\_]+)$','index.php?pagename='.$_app_slug.'&module=$matches[1]', 'top' );                
		    add_rewrite_rule( '^'.$_app_slug.'/([A-Za-z0-9\-\_]+)/([A-Za-z0-9\-\_]+)$','index.php?pagename='.$_app_slug.'&module=$matches[1]&action_page=$matches[2]', 'top' );                
		    add_rewrite_rule( '^'.$_app_slug.'/([A-Za-z0-9\-\_]+)/([A-Za-z0-9\-\_]+)/([A-Za-z0-9\-\_]+)$','index.php?pagename='.$_app_slug.'&module=$matches[1]&action_page=$matches[2]&action_id=$matches[3]', 'top' );		    
        }
	}
	
	public function app_parse_request( $query ) {
        $qv = $query->query_vars;
        if( isset( $qv['pagename'] ) && $qv['pagename'] != '' ) {
            self::$pagename = $qv['pagename'];
        }
        if( isset( $qv['module'] ) && $qv['module'] != '' ) {
            self::$module = $qv['module'];
        }
        if( isset( $qv['action_page'] ) && $qv['action_page'] != '' ) {
            self::$action_page = $qv['action_page'];
        }
        if( isset( $qv['action_id'] ) && $qv['action_id'] != '' ) {
            self::$action_id = $qv['action_id'];
        }
	}
	
	public function redirect_page() {
		if( self::$app_slug == self::$pagename && self::$module == '' ) {
			wp_redirect( home_url( '/' ) );
			exit;
		}
	}
	
}