Online PHP editor | refs for TRvO4

<?php $current_url_host = 'sub.example.com'; $main_url_host = 'example.com'; $current_url_host_rev = strrev( $current_url_host ); $main_url_host_rev = strrev( $main_url_host ); if ( strpos( $current_url_host_rev, $main_url_host_rev ) === 0 ) { echo 'z'; } $current_url_sub_domains = strrev( $current_url_host_rev ); echo $main_url_host_rev;