How to write this REGEX - php?

Question

I have this string: list_tablename.json.php?type=arr . I need to grab the tablemane . I could achieve this task through a combination of stripos() and substr() . I would like to know how to accomplish this using regex. In fact how to grab everything between _ and first . ?

Following this post , this pattern (?<=_)(.+)(.json) should work, but it is not. regex

Answer 1

Use a positive lookbehind for _ , and get the portion till next . :

(?<=_)[^.]+

Demo