从字符串获取主题标签，并进入meta关键字和标签 [英] Get hashtag from string and get into meta keywords and tags

问题描述

我正在创建一种博客共享链接.基本上，对于每个链接，我将从帖子字符串中提取主题标签，并将其放入元标签和关键字中.

I'm creating a kind of a blog sharing link. Basically, for each link i would extract hashtag from post string and put it into a meta tags and keywords.

所以，字符串通常是这样的

So, string normally is like this

#helloworld #test #video #youtube Bon Iver are the best daily surprise :D

现在，我如何仅获取主题标签并将其插入这样的字符串中?

Now, how can i get only hashtags and insert into a string like this ?

$hashtags = helloworld,test,video,youtube

然后在元标记中插入井号

And after insert hashtags in meta tag

<meta name="keywords" content="<? echo $hashtags ?>" >
<meta name="tags" content="<? echo $hashtags ?>">

实际上，我使用此脚本来删除#"并放入，"

Actually i used this script to remove "#" and put ","

$hashclear = preg_replace('/#([A-Za-z0-9]+)/', '$1,', $post);

我如何获得这些?有什么想法吗?

How can i get these ? Any ideas ?

推荐答案

您的意思是这样的吗:

$str = '#helloworld #test #video #youtube Bon Iver are the best daily surprise :D';

preg_match_all('/#([^\s]+)/', $str, $matches);

$hashtags = implode(',', $matches[1]);

var_dump($hashtags);

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