15.1. Using server environment and system functions

15.1.1. Environment variables

We have examined some Perl scripts and their applications in Chapters 13 and 14. In this chapter, we will concentrate on how Perl can be applied to some popular interactive CGI applications including “Online Examinations and Marking,” “Seat Reservations,” “Search Engine,” and “Database.” In fact, the structure and scenario of the study is not limited to Perl script. The idea of the Common Gateway Interface or CGI, roughly speaking, is an abstraction about Web applications on a server. Perl is just a fashionable operating process to achieve that purpose. In parallel to the study and examples of this chapter, other CGI scripting languages such as PHP and ASP can ...

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