Regular Expression-in PHP, how to use regular expressions to extract the specified html container

{Code...} above, I need to extract all the container content whose class is baby. The structure is not necessarily like this. That is to say, I need to extract the content of a container. Thank you.

 
 contont 
ppppppp
    
    my link    
 
 contont 
ppppppp
    
    my link    
 
 contont 
ppppppp
    
    my link    

In the above code, I need to extract all the container content whose class is baby. The structure is not necessarily like this. That is to say, I need to extract the content of a container. Thank you.

Reply content:

 
 contont 
ppppppp
    
    my link    
 
 contont 
ppppppp
    
    my link    
 
 contont 
ppppppp
    
    my link    

In the above code, I need to extract all the container content whose class is baby. The structure is not necessarily like this. That is to say, I need to extract the content of a container. Thank you.

I don't know why everyone wants to use regular expressions to extract the DOM tree... regular expressions are not used to do this...

When you want to do this... Do you see regular expressions filled with grievances ..?

It is not good to make the cloudification of the Trojan horse... if you want to extract the DOM tree... the correct method is as follows...

  loadHTML( <<
          
   
 contont 
   
ppppppp
    
   
    my link    
   

   

   
 
   
 contont 
   
ppppppp
    
   
    my link    
   

   

   
 
   
 contont 
   
ppppppp
    
   
    my link    
   

   

   
HTML_SECTION);/* make a result array ... */$result = [];/* go through all nodes which have class="baby" ... */foreach( ( new DOMXPath( $doc ) )->query( '//*[@class="baby"]' )     as $element )    /* just push it into the result ... */    $result[] = $doc->saveHTML( $element );/* and print the result out ... */print_r( $result );
  

I have clearly written about other DOM modules in my previous answers... I will not repeat them here...

If you are interested, take a look...

As for the title question... for more than 90% cases... the answer isYou cannot use regular expressions....

If you insist that you must use regular expressions instead of regular expressions, and the documents you want to process are the same as those in your example... there is a method as follows...

  .*^\\1
  )ism',<<
          
   
 contont 
   
ppppppp
    
   
    my link    
   

   

   
 
   
 contont 
   
ppppppp
    
   
    my link    
   

   

   
 
   
 contont 
   
ppppppp
    
   
    my link    
   

   

   
HTML_SECTION, $result_tmp );/* only the first element we need ... */print_r( array_shift( $result_tmp ) );
  

This method is only applicable to well-formatted html documents... the indentation is used to determine the corresponding relationship of tags...

If it is a chaotic html document... Then regular expressions are powerless to extract DOM...

Grace... that's it...

PHP query, https://code.google.com/p/phpquery/
Introduction look at http://www.cnblogs.com/in-loading/archive/2012/04/11/2442697.html

$preg = '/\
(.*?)\<\/p\>/s';preg_match_all($preg, $html, $match);

I don't know if this works ~