SimpleXMLElement simplexml_load_string ( string $data [, string $class_name = "SimpleXMLElement" [, int $options = 0 [, string $ns = "" [, bool $is_prefix = false ]]]] )

<?php

$xml_string = file_get_contents($_SERVER['DOCUMENT_ROOT'].'/data.xml');

$enc = mb_detect_encoding($xml_string, array('EUC-KR', 'UTF-8', 'shift_jis', 'CN-GB'));

if($enc != 'UTF-8'){

    $xml_string = iconv($enc, 'UTF-8', $xml_string);  //본인 사이트에 맞는 인코딩으로 변경

}

$xml = simplexml_load_string($xml_string);

var_dump($xml);

?>

또는 

<?php

$response = file_get_contents($url);

$object = simplexml_load_string($response);

echo $object->title;

echo $object->from;

?>