Is there anything wrong with using requires after output starts printing?
Example:
my $page = $args{'p'};
exit 1 if $page =~ /[^\d\w]/;
print "Content-Type: text/html\n\n";
print "<html><head></head><body>";
require "$page.pl";
somefunc();
print "</body></html>";
Is there anything wrong with using the require after开发者_如何学Python the output has started or should all requires be at the top of the script?
I don't think there's anything wrong with that.
But if you want or need more consistency in your scripts, you could rewrite the code in the required script as a subroutine. For example:
##### old page.pl ######
print "This is the body.<P>\n";
1;
##### old cgi script #####
print "Content-type: text/html\n\n";
print "<html><head></head><body>\n";
require "page.pl";
##### new page.pl ######
sub page_body {
print "This is the body.<P>\n";
}
1;
##### new cgi script #####
require "page.pl"; # now at the top of script
print "Content-type: text/html\n\n";
print "<html><head></head><body>\n";
&page_body;
No, there's no need for all requires to be at the top. Though, if the require fails, your HTML would be halfway sent already. :-P
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