How do use this code v1.1

[fakobabaopucuk]

function fullname($screen_name) {
$api_page = ‘https://twitter.com/users/show/’.$screen_name;
$xml = file_get_contents ( $api_page );
$profile = new SimpleXMLElement ( $xml );
echo $profile->name; }

doesn’t works with v1.1 please help me

[ibrahimserhat_]

i have some problem.