function get_content($URL){
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_URL, $URL);
    $data = curl_exec($ch);
    curl_close($ch);
     return $data;
}
$ip = $_SERVER['REMOTE_ADDR'];
$url =  "http://ip-api.com/xml/". $ip. "?fields=regionName";
$veri = get_content($url);
$xml = simplexml_load_string($veri);
echo  (string)$xml->regionName ;

<?php
$ip=$_SERVER['REMOTE_ADDR'];
$veri=file_get_contents("http://ip-api.com/xml/$ip");
preg_match("@<regionName>(.*?)</regionName>@si",$veri,$yazdir);
$yazdir[1]=str_replace('<![CDATA[','',$yazdir[1]);
$yazdir[1]=str_replace(']]>','',$yazdir[1]);
echo "$yazdir[1]";
?>