Question

If I enter http://localhost/sitename?filter=city I would like to display all the cities in xml format

I would like the xml display in tag format like this

<city>
   <navi mumbai>
   <pune>
</city>

Answer 1

Here is sample php code , run this code with your link as filter as your condition

    Header("Content-type: text/xml"); 
    // get query string params
    $filter = $_GET['filter'];

    $xml = '';

    If ($filter == "city"){
        $xml = $xml . '<continent name="city">';
        $xml = $xml . '<city id="1">Navi Mumbai</city>';
        $xml = $xml . '<city id="2">Thane</city>';
        $xml = $xml . '<city id="3">Pune</city>';
        $xml = $xml . '</continent>';
    }else If ($filter == "country"){
        $xml = $xml . '<continent name="country">';
        $xml = $xml . '<country id="100">India</country>';
        $xml = $xml . '</continent>';
    }else If ($filter == "state"){
        $xml = $xml . '<continent name="state">';
        $xml = $xml . '<state id="300">Maharastra</state>';
        $xml = $xml . '</continent>';
    }else{
        $xml = $xml . '<continent name="none">';
        $xml = $xml . '<country id="0">no result found</country>';
        $xml = $xml . '</continent>';
    }

    // send xml to client
    echo( $xml );
?>