Update: crazyinsomniac kindly pointed out that this valuable piece of info was left out of my post: 
$CGI::revision = '$Id: CGI.pm,v 1.49 2001/02/04 23:08:39 lstein Exp $'
+;
$CGI::VERSION='2.752';

[download]
Below you will find lines 272 - 312 of CGI.pm of which param() is a method. There is a WHOLE lot more documentation on param() in CGI.pm 's pod.
HTH
jg
#### Method: param
# Returns the value(s)of a named parameter.
# If invoked in a list context, returns the
# entire list.  Otherwise returns the first
# member of the list.
# If name is not provided, return a list of all
# the known parameters names available.
# If more than one argument is provided, the
# second and subsequent arguments are used to
# set the value of the parameter.
####
sub param {
    my($self,@p) = self_or_default(@_);
    return $self->all_parameters unless @p;
    my($name,$value,@other);

    # For compatibility between old calling style and use_named_parame
+ters() style, 
    # we have to special case for a single parameter present.
    if (@p > 1) {
    ($name,$value,@other) = rearrange([NAME,[DEFAULT,VALUE,VALUES]],@p
+);
    my(@values);

    if (substr($p[0],0,1) eq '-') {
        @values = defined($value) ? (ref($value) && ref($value) eq 'AR
+RAY' ? @{$value} : $value) : ();
    } else {
        foreach ($value,@other) {
        push(@values,$_) if defined($_);
        }
    }
    # If values is provided, then we set it.
    if (@values) {
        $self->add_parameter($name);
        $self->{$name}=[@values];
    }
    } else {
    $name = $p[0];
    }

    return unless defined($name) && $self->{$name};
    return wantarray ? @{$self->{$name}} : $self->{$name}->[0];
}

[download]
_____________________________________________________
Think a race on a horse on a ball with a fish! TG

In reply to Re: Newbie needs to know more about param() by jerrygarciuh
in thread Newbie needs to know more about param() by spork

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.