从html中提取标题标签 [英] extract title tag from html

问题描述

我想从html字符串中提取标题标签的内容。我做了一些搜索，但到目前为止我无法在VB / C＃或PHP中找到这样的代码。这也应该适用于大写和小写标签，例如应与< title>< / title> 和< TITLE>< / title> 一起使用。谢谢。

I want to extract contents of title tag from html string. I have done some search but so far i am not able to find such code in VB/C# or PHP. Also this should work with both upper and lower case tags e.g. should work with both <title></title> and <TITLE></TITLE>. Thank you.

推荐答案

你可以使用正则表达式来实现这个功能，但它不是完全防错的。它会做，如果你只是想简单的东西（在PHP中）：

You can use regular expressions for this but it's not completely error-proof. It'll do if you just want something simple though (in PHP):

function get_title($html) {
  return preg_match('!<title>(.*?)</title>!i', $html, $matches) ? $matches[1] : '';
}

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