<?php

$cookie = array(
                   'name'   => 'sort_order',
                   'value'  => 'The Value',
                   'expire' => '86500',
                   'domain' => '.some-domain.com',
                   'path'   => '/',
                   'prefix' => 'myprefix_',
               );

set_cookie($cookie);
?>
<?php echo get_cookie('sort_order');?>