file_get_contents返回特定URL的不可读文本

Question

When I try to read the rss feeds of the kat.cr using php file_get_contents function, I get some unreadable text but when I open it up with my browser the feed is fine.
I have tried many other hosts but no chance in getting the correct data.
I even have tried setting the user-agent to diffrent browsers but still no change.
this is a simple code that I've tried:

$options  = array('http' => array('user_agent' => 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:40.0) Gecko/20100101 Firefox/40.1'));
$url = 'https://kat.cr/movies/?rss=1';
$data = file_get_contents($url, FILE_TEXT, stream_context_create($options));
echo $data;

I'm curious how their doing it and what I can do to overcome the problem.

A part of unreadable text:

‹ي]يrم6–‎?Oپي©™ت,à7{»‌âgw&يؤe;éN¹\\S´HK\\S¤–¤l+ے÷ِùِIِ”(إژzA5‌ةض؛غ%K4ـ{qtqy½ùوa^ »¬nٍھ|ûٹSِ eه¤Jَrِْصڈ1q^}sü§7uسlدزؤYً¾²yفVu‌•يغWGG·Iس&m>،“j~$ےzؤ(?zï‍ج'²جٹم?!ّ÷¦حغ";‏گ´Yس¢ï³{tر5ز ³َsgYٹْ.ں@

Actually everytime I open up the link there is some different unreadable text.

Answer 1

As I mentioned in the comment - the contents returned are gzip encoded so you need to un-gzip the data. Depending upon your version of php you may or may not have gzdecode installed, I don't but the function here does the trick.

if( !function_exists('gzdecode') ){
    function gzdecode( $data ){ 
        $g=tempnam('/tmp','ff'); 
        @file_put_contents( $g, $data );
        ob_start();
        readgzfile($g);
        $d=ob_get_clean();
        unlink($g);
        return $d;
    }   
}
$data=gzdecode( file_get_contents( $url ) );
echo $data;