Regular expressions will not solve the problem

Regular expressions do not solve the problem of using regular expressions to delete the head and foot pages of a webpage. & nbsp; or is there any other way to delete the head and foot sections of the webpage? ------ solution -------------------- delete a part other than & lt; body & gt? Here is an example. ------ solution ------------------ if this regular expression is used, it will not be solved.
How to use regular expressions to delete head and foot parts of a webpage
The page is generated

Or you can delete the head and foot of a webpage in other ways.

------ Solution --------------------
DeleteOther parts?
Here is an example.
------ Solution --------------------
If so: you can try:

PHP code

$ String ='
  
  
  Regular expressions won't solve the problem-PHP/basic programming
  Dsgtpd

  
   
Dsgtpd
  '; $ Pattern = '/(
  
   
. * <\/Head>) | (
   
    
. * <\/Foot>)/I '; print preg_replace ($ pattern, '', $ string );