Online PHP editor | refs for O8XeV

<?php $current_url_host = 'sub.miao.example.com'; $main_url_host = 'example.com'; $current_url_host_rev = strrev( $current_url_host ); $main_url_host_rev = strrev( $main_url_host ); $current_url_sub_domains_rev = ''; if ( strpos( $current_url_host_rev, $main_url_host_rev ) === 0 ) { $current_url_sub_domains_rev = trim( substr( $current_url_host_rev, strlen($main_url_host_rev) ), '.'); } echo strrev($current_url_sub_domains_rev);