When PHP is matched, can a long string be treated as an atom, for example, the following

(
 
  
  

  
   
   
.*?<\/p><\/blockquote>)?
 
  
  

I want to match this piece of content, but this content

.*?<\/p><\/blockquote> is dispensable.
But what's in the back? It's about atoms, it means 0 or 1 atoms, and the front is not an atom but a string.
How to achieve it?

Reply to discussion (solution)

Add a choice

(

. *?<\/p><\/blockquote>|. *)?

Add a choice

(

. *?<\/p><\/blockquote>|. *)? The test, the error.

don't know what you're going to do?

don't know what you're going to do?
I want to match this content

 
     
     
 
      
      
 Middle is content 
 
     
     
 

But this paragraph There may be content, there may not be. That's it.

What does that mean?

preg_match_all ('/(BB)? ( c+)/', ' ABBCCC ', $r);p rint_r ($r);p Reg_match_all ('/(BB)? ( 
 c+)/', ' ABDCCC ', $r);p Rint_r ($r); 

What does that mean?

preg_match_all ('/(BB)? ( c+)/', ' ABBCCC ', $r);p rint_r ($r);p Reg_match_all ('/(BB)? ( c+)/', ' ABDCCC ', $r);p Rint_r ($r); 

No. If you can't speak clearly, you can solve it by other means first. Thank you.

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