Ask for a regular expression! Workaround

Ask for a regular expression!

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I would like to get the ID B of the UL in each Li content, the regular should be how to write?

/

*? (. *?) <\/li>.*?<\/ul>/is only matches the contents of the first Li
------solution--------------------


 $s =& lt;< 
     
    
   
 
     
    
 
     
    
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* give you a reference, your own according to the need to modify the next
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