Test, validate and match regular expressions
This regular expression matches JHP (Javascript 'hypertext' preprocessor) template tags enclosed within `{%` and `%}` delimiters. Using the dotall flag (`s`), the `(.+)` capturing group matches the inner content of the tag, even if it spans multiple lines. It is typically used to parse or extract inline directives, such as include statements or logic blocks, within a JHP document.