Regular Expressions-PHP regular match content?

#sayhi   aaa   #牢骚    bbb     #test    ccc

Want to match out

#sayhi#牢骚#test

This label,
Then use:

preg_match_all("/#[a-zA-Z0-9\x{4e00}-\x{9fa5}]+<\\/span>/u", $s, $catspan);

The matching $catspan is

   Array ( [0] =>      Array (           #sayhi            #牢骚            #test             )          )       

What should I do next?

Reply content:

#sayhi   aaa   #牢骚    bbb     #test    ccc

Want to match out

#sayhi#牢骚#test

This label,
Then use:

preg_match_all("/#[a-zA-Z0-9\x{4e00}-\x{9fa5}]+<\\/span>/u", $s, $catspan);

The matching $catspan is

   Array ( [0] =>      Array (           #sayhi            #牢骚            #test             )          )       

What should I do next?

Preg_match_all ("/.*>#[a-zA-Z0-9x{4e00}-x{9fa5}]+<\/span>/u", $s, $catspan);

问题在这个.*上，正则默认是贪婪匹配，而.本身就代表所有字符，自然包括>在内，所以就把后面的内容都匹配进去了。
通过修改为.*?可以实现非贪婪匹配，这样就能正确结束于>上，获得你想要的结果。

 
$pattern = "/\]+\>[^\<]+\<\/span\>/";
 

 
preg_match_all('/
  
   
    
   ]+>#[^<]+<\\/span>/', $s, $catspan);
  
   
 

我的正则会这么写：

<>]*?>#[\s\S]*?

I'm not sure what you're writing about.

