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15.2. Design of mod_perl

mod_perl is not a Perl module. It is a module of the Apache server, which is currently the most commonly used web server. With mod_perl, you can use Apache configuration directives not only to process CGI scripts much more efficiently, but also to handle all stages in processing a server request.

mod_perl embeds a copy of the Perl interpreter into the Apache httpd executable, providing complete access to Perl functionality within Apache. This enables a set of mod_perl-specific configuration directives, all of which start with the string Perl*. Most of these directives are used to specify handlers for various stages of the request, but not all. In addition, mod_perl lets you embed Perl code into your Apache configuration files (within <Perl> ... </Perl> directives) and allows you to use Perl for server side includes.

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