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URI::QueryParam(3)    User Contributed Perl Documentation   URI::QueryParam(3)
NAME
       URI::QueryParam - Additional query methods for URIs
SYNOPSIS
         use URI;
         use URI::QueryParam;
         $u = URI->new("", "http");
         $u->query_param(foo => 1, 2, 3);
         print $u->query;    # prints foo=1&foo=2&foo=3
         for my $key ($u->query_param) {
             print "$key: ", join(", ", $u->query_param($key)), "\n";
         }
DESCRIPTION
       Loading the "URI::QueryParam" module adds some extra methods to URIs
       that support query methods.  These methods provide an alternative
       interface to the $u->query_form data.
       The query_param_* methods have deliberately been made identical to the
       interface of the corresponding "CGI.pm" methods.
       The following additional methods are made available:
       @keys = $u->query_param
       @values = $u->query_param( $key )
       $first_value = $u->query_param( $key )
       $u->query_param( $key, $value,... )
           If $u->query_param is called with no arguments, it returns all the
           distinct parameter keys of the URI.  In a scalar context it returns
           the number of distinct keys.
           When a $key argument is given, the method returns the parameter
           values with the given key.  In a scalar context, only the first
           parameter value is returned.
           If additional arguments are given, they are used to update
           successive parameters with the given key.  If any of the values
           provided are array references, then the array is dereferenced to
           get the actual values.
           Please note that you can supply multiple values to this method, but
           you cannot supply multiple keys.
           Do this:
               $uri->query_param( widget_id => 1, 5, 9 );
           Do NOT do this:
               $uri->query_param( widget_id => 1, frobnicator_id => 99 );
       $u->query_param_append($key, $value,...)
           Adds new parameters with the given key without touching any old
           parameters with the same key.  It can be explained as a more
           efficient version of:
              $u->query_param($key,
                              $u->query_param($key),
                              $value,...);
           One difference is that this expression would return the old values
           of $key, whereas the query_param_append() method does not.
       @values = $u->query_param_delete($key)
       $first_value = $u->query_param_delete($key)
           Deletes all key/value pairs with the given key.  The old values are
           returned.  In a scalar context, only the first value is returned.
           Using the query_param_delete() method is slightly more efficient
           than the equivalent:
              $u->query_param($key, []);
       $hashref = $u->query_form_hash
       $u->query_form_hash( \%new_form )
           Returns a reference to a hash that represents the query form's
           key/value pairs.  If a key occurs multiple times, then the hash
           value becomes an array reference.
           Note that sequence information is lost.  This means that:
              $u->query_form_hash($u->query_form_hash);
           is not necessarily a no-op, as it may reorder the key/value pairs.
           The values returned by the query_param() method should stay the
           same though.
SEE ALSO
       URI, CGI
COPYRIGHT
       Copyright 2002 Gisle Aas.
perl v5.26.3                      2018-01-09                URI::QueryParam(3)