当我在youtube脚本中搜索视频时，偶尔会出现此错误，有时它只是有效，但问题再次出现。有人可以帮我解决这个问题吗？
错误讯息：
Warning: simplexml_load_file(http://gdata.youtube.com/feeds/api/videos?vq=music&orderby=relevance&max-results=10&start-index=201&lr=en): failed to open stream: HTTP request failed! HTTP/1.0 403 Forbidden in /home/website/public_html/search.php on line 119
Warning: simplexml_load_file(): I/O warning : failed to load external entity "http://gdata.youtube.com/feeds/api/videos?vq=music&orderby=relevance&max-results=10&start-index=201&lr=en" in /home/website/public_html/search.php on line 119
Fatal error: Call to a member function children() on a non-object in /home/website/public_html/search.php on line 122
第119行：
$sxml = simplexml_load_file($feedURL);
第122行：
$counts = $sxml->children('http://a9.com/-/spec/opensearchrss/1.0/');