use strict;
use warnings;
use LWP::UserAgent;

my $ua = new LWP::UserAgent();
my $url = "http://someurl";

my $request = new HTTP::Request( 'POST', $url );
$request->content_type( 'application/x-www-form-urlencoded' );
$request->content( 'name=value');

my $response = $ua->request( $request );