$url="merhaba-bu-bir-konudur-10";
echo end(explode('-',$url));
url yi otomatik alan hali
echo end(explode('-',$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI']));
Fonksiyon hali
function get_page_number()
{
return end(explode('-',$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI']));;
}