I agree with Russ, don't use a redirect. It is confusing
to users, because they won't know what they did wrong.
I usually just take an array of "required" field names and
loop through it and any that are blank get added to a scalar
that contains an HTML list, like so:
use CGI;
my $q = new CGI;
my $missed;
my @required = qw(name address phone email);
for (@required) {
$missed .= "<li>$_</li>\n" if $q->param($_) eq "";
}
do {
print "Content-type: text/html\n\n";
print qq~
You forgot to fill in the following required fields:
<ul>$missed</ul>
~;
} if $missed;
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Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
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<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
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<small> <strike> <strong>
<sub> <sup> <table>
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<u> <ul>
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Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
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or How to display code and escape characters
are good places to start.
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