i want to make certificate with my user fields, like date of birth, date of exam , course name with content of course data, date of issue of certificate and signature. if any plugin is available then please inform me faster.
Not sure which certificate plugin you mean. There are several plugins that have certificate in their name.
Was is the "content of course" data? Do you mean the course description?
While anything is possible in Moodle, some of what you want probably means altering the php code in places not mentioned in the documentation. I think creating the string that contains the course description or custom user_fields might be another complicated thing to do that needs someone with PHP skills and knowledge of the Certificate code.
Hope this helps you get started,