Namespace pollution in scripts under Apache::Registry

With mod_cgi, since the script is initialized every time, the variable $required_name will always start out undefined.

However, with mod_perl’s Apache::Registry, once $required_name is defined, it won’t be undefined or reinitialized, and therefore will always execute the code within the conditional. Code such as this might be

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found in a CGI program that carries values forward from page to page, such as a shopping cart or other wizard-style CGI program.

 use CGI; $query = CGI->new(); if ($required_name) { print header; print "name is $required_name\n"; #do something else } else { $required_name = $query->param("name"); #die }

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