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find and edit comment element of html with php
你好一般来说，正则表达式让我难以理解。我的问题的答案应该很简单，但经过一段时间的挖掘，我仍然不知道答案是什么。如何使用PHP中的preg_match（）从HTML摘录中提取“Orange County，CA”？：
<!-- CLTAG GeographicArea=Orange County, CA -->
请注意，此区域中的文本将是可变的，因此正则表达式需要是动态的才能说明这一点。
您可以使用的一个正则表达式是：
$matches = array();
preg_match( /<!-- CLTAG GeographicArea=(.*?) -->/ , $html, $matches);
echo $matches[1];
如果HTML中有多个这样的注释，请使用preg_match_all（）。
正则表达式：
preg_match( #<--(.*)=(.*)--># , $html, $matches);
$matches[1] //contain data
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