arama yaptık bu hatayı verdi türkçe karakter hatası var her yerde bakarsanız

Warning: file_get_contents(Ismail YK - Isterim Seni seven) [function.file-get-contents]: failed to open stream: HTTP request failed! HTTP/1.1 500 Server Error in /home/istebul/public_html/arama.php on line 258


$sorgu=str_replace(" ", "+", $sorgu);
kodu ekledim bu seferde bu hata

Warning: file_get_contents(Ismail YK - Isterim Seni seven) [function.file-get-contents]: failed to open stream: HTTP request failed! HTTP/1.1 500 Server Error in /home/istebul/public_html/arama.php on line 259


Arama Php 258 ve 259 satırlar

$f = "http://www.youtube.com/api2_rest?method=youtube.videos.list_by_tag&dev_id =7db6FB9UBjg&tag=$sorgu";
$xml = file_get_contents ($f);