Evaluate a regular expression! Solution

Evaluate a regular expression! & Lt; ul & nbsp; id = "a" & gt; & lt; li & nbsp; style = "display: none" & gt; xxx & lt; /li & gt; & lt; li & nbsp; style = "display: block" & gt; xxx & lt;/li & gt; & lt; li & gt; xxx & lt;/li & calculates a regular expression!

Xxx
Xxx

Xxx

Xxx
Xxx

Xxx

I want to obtain the contents of every li in UL with ID B in the regular expression. how should I write the regular expression?

/ .*? (.*?) <\/Li> .*? <\/Ul>/is can only match the content in the first li to share: Xxx Xxx

Xxx
------ Solution --------------------

$s=<<
            
            
             

             
              xxx
             
            

Xxx

Xxx

Xxx
Xxx

Xxx

Html;

Preg_match ('# (. +)# Is ', $ s, $ m );
Preg_match_all ('# ] *> (. +)# IsU ', $ m [1], $ arr );
Print_r ($ arr [1]);
------ Solution --------------------
(? <= (? : \ S * .*? <\/Li> \ s *) \ s * (.*?) <\/Li> \ s * to give you a reference. you can modify it as needed.