backrefs features 3

https://wiki-view.win/index.php/A_Practical_Backrefs_Comparison_for_Smarter_Link_Building

Backrefs features let you reference previously matched groups in your regex pattern, so you can find repeated words or patterns like HTML tags. They're handy for checking palindromes or ensuring paired delimiters match. Using them well makes your patterns more concise and powerful, though they can get complex quickly.