Wordpress Rewrite Rules

rewrite-rules.php

<?php 
add_action( 'init', function () {
    add_rewrite_rule('blog/market/([^/]+)/category/([^/]+)/page/([0-9]{1,})/?$', 'index.php?pagename=blog&pg=$matches[3]&market=$matches[1]&category=$matches[2]', 'top');
    add_rewrite_rule('blog/market/([^/]+)/category/([^/]+)/?$', 'index.php?pagename=blog&market=$matches[1]&category=$matches[2]', 'top');

    add_rewrite_rule('blog/market/([^/]+)/page/([0-9]{1,})/?$', 'index.php?pagename=blog&pg=$matches[2]&market=$matches[1]', 'top');
    add_rewrite_rule('blog/market/([^/]+)/?$', 'index.php?pagename=blog&market=$matches[1]', 'top');

    add_rewrite_rule('blog/category/([^/]+)/page/([0-9]{1,})/?$', 'index.php?pagename=blog&paged=$matches[2]&category=$matches[1]', 'top');
    add_rewrite_rule('blog/category/([^/]+)/?$', 'index.php?pagename=blog&category=$matches[1]', 'top');
});

// Wordpress has to know about your new get var if you want them to work
//   for get_query_var
add_filter( 'query_vars', function( $vars ) {
    $vars[] = 'category';
    $vars[] = 'market';
    return $vars;
});