开头和结尾标记不匹配：来自Google Groups的RSS提要中的元行1和头

以下PHP已经运行了几年：

<?php
    $counter = 0;
    $rss = new SimpleXMLElement('http://groups.google.com/group/boy-scout-troop-845/feed/rss_v2_0_msgs.xml', null, true);
?>

它现在生成如下错误：

Warning: SimpleXMLElement::__construct() [simplexmlelement.--construct]: ... parser error : Opening and ending tag mismatch: meta line 1 and head in /home/content/t/r/o/troo9757/html/index.php on line 119

Warning: SimpleXMLElement::__construct() [simplexmlelement.--construct]: ..."></head in /home/content/t/r/o/troo9757/html/index.php on line 119

Warning: SimpleXMLElement::__construct() [simplexmlelement.--construct]: ^ in /home/content/t/r/o/troo9757/html/index.php on line 119

Warning: SimpleXMLElement::__construct() [simplexmlelement.--construct]: ...
: parser error : Opening and ending tag mismatch: head line 1 and html in /home/content/t/r/o/troo9757/html/index.php on line 119

Warning: SimpleXMLElement::__construct() [simplexmlelement.--construct]: ... in /home/content/t/r/o/troo9757/html/index.php on line 119

Warning: SimpleXMLElement::__construct() [simplexmlelement.--construct]: ^ in /home/content/t/r/o/troo9757/html/index.php on line 119

Warning: SimpleXMLElement::__construct() [simplexmlelement.--construct]: ...  parser error : Premature end of data in tag html line 1 in /home/content/t/r/o/troo9757/html/index.php on line 119

Warning: SimpleXMLElement::__construct() [simplexmlelement.--construct]: forum/feed/boy-scout-troop-845/msgs/rss_v2_0.xml</a>...</noscript></body></html> in /home/content/t/r/o/troo9757/html/index.php on line 119

Warning: SimpleXMLElement::__construct() [simplexmlelement.--construct]: ^ in /home/content/t/r/o/troo9757/html/index.php on line 119

Fatal error: Uncaught exception 'Exception' with message 'String could not be parsed as XML' in /home/content/t/r/o/troo9757/html/index.php:119 Stack trace: #0 /home/content/t/r/o/troo9757/html/index.php(119): SimpleXMLElement->__construct('... on line 119

请注意，我已将链接替换为。。。为了让这个被接受。我查看了返回的XML，它看起来很好。有没有可能只是时间太长了？有什么建议吗

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谢谢

谷歌似乎已经改变了他们的RSS源，将HTTP流量重定向到HTTPS。若查看试图获取的XML文件的响应，它实际上返回带有重定向标记的HTML

只需直接调用https即可解决此问题

$rss = new SimpleXMLElement('https://groups.google.com/group/boy-scout-troop-845/feed/rss_v2_0_msgs.xml', null, true);