<?php
class foo
{
    public $returnUrl
    , $required = array()
    , $optional = array()
    , $verify_peer = null
    , $capath = null
    , $cainfo = null
    , $data;

    static protected $ax_to_sreg = array(
        'namePerson/friendly'     => 'nickname',
        'contact/email'           => 'email',
    );
}
$instance = new foo;
exit;