PHP regular expression problems

1. how can I correctly match the bookmarked backup file (in html format) exported by Google and Firefox to correctly read the parent-child relationship between the category directory and bookmarks? 2. exported backup bookmarks: {code ...} try to match with a regular expression, but the learning is not refined, it is always impossible to get the correct... 1. how can I correctly match the bookmarked backup file (in html format) exported by Google and Firefox, and correctly read the parent-child relationship between the category directory and bookmarks?

2. Format of exported backup bookmarks:

  
  

    Technical webpage 
   
 
    
 
 
    

      Hacker 
     
 
      
 
 
      

        Manual SQL injection 
      
 
      

        Burp Suite detailed tutorial-detailed description of Intruder module-software tools- 
      
 
     
 
     
 
 
    
 
    

      Android development 
     
 
      
 
 
      

        Adb not responding you can wait more-Android mobile development technical article _ mobile development-red/black Alliance 
      
 
     
 
     
 
 
    
 
    

      Code sharing list-PHP-Open Source Chinese community 
    
 
    

      Yibai tutorial-focus on IT tutorials and instances 
    
 
   
 
   
 
  
  
  

    XAMPP Installers and Downloads for Apache Friends 
  
  
  

    XAMPP Installers and Downloads for Apache Friends 
  
 
 

  
  XAMPP Installers and Downloads for Apache Friends
 
 

I tried to use regular expressions for matching, but I was not refined. I was always unable to correctly obtain the upper-and lower-level relationships. how can I help you?

Reply content:

1. how can I correctly match the bookmarked backup file (in html format) exported by Google and Firefox to correctly read the parent-child relationship between the category directory and bookmarks?

2. Format of exported backup bookmarks:

  
  

    Technical webpage 
   
 
    
 
 
    

      Hacker 
     
 
      
 
 
      

        Manual SQL injection 
      
 
      

        Burp Suite detailed tutorial-detailed description of Intruder module-software tools- 
      
 
     
 
     
 
 
    
 
    

      Android development 
     
 
      
 
 
      

        Adb not responding you can wait more-Android mobile development technical article _ mobile development-red/black Alliance 
      
 
     
 
     
 
 
    
 
    

      Code sharing list-PHP-Open Source Chinese community 
    
 
    

      Yibai tutorial-focus on IT tutorials and instances 
    
 
   
 
   
 
  
  
  

    XAMPP Installers and Downloads for Apache Friends 
  
  
  

    XAMPP Installers and Downloads for Apache Friends 
  
 
 

  
  XAMPP Installers and Downloads for Apache Friends
 
 

I tried to use regular expressions for matching, but I was not refined. I was always unable to correctly obtain the upper-and lower-level relationships. how can I help you?

It can only be said that using regular expressions in this form is not as good as using DOM for parsing ......