---

Date Posted: 9/20/19

Summary: PCRE –– tutorial part 2

• Largely rewritten.  Last update was 8 years ago.
  
• Typos fixed.
  
• links updated or removed.
  
• Much of it reworded for readability.
  
• Incorrect explanations corrected.  etc.
  
• Added preg_replace_callback() function.

update 09/26/19: reworded and greatly simplified the first section: subpatterns.
update 10/04/19: Updated the example for preg_replace_callback() as it was incomplete.