Description:
------------
If server class is included / required (or included/required once) from external file the persistence doesn't work.

I think that the BUG is related to already reported bugs #51561 and #44267. 


Test script:
---------------
client.php
------------

<?php

  # Soap client
  $client = new SoapClient(NULL,
    array(
    "location" => "http://localhost/server.php",
    "uri" => "urn:xmethodsTest",
    'trace' => 1
  ));

  # SOAP requests
  try {

    $session = $client->login();

    //$client->__setCookie('PSESSION', $session);

    print $client->incVar(); print "\n";
    print $client->incVar(); print "\n";
    print $client->incVar(); print "\n";
    print $client->incVar(); print "\n";
    print $client->incVar(); print "\n";

  } catch (SoapFault $sf) {
        echo "<PRE>";
        echo $sf;
  }


?>


server.php
--------------

<?php
  session_name('PSESSION');

  if ( $_COOKIE['PSESSION'] ) {
    session_id($_COOKIE['PSESSION']);
  }
  $res = session_start();

  require('class.bar.php');


  $server = new SoapServer(NULL, array('uri' => 'http://193.59.86.29/'));
  $server->setClass('Bar');
  $server->setPersistence(SOAP_PERSISTENCE_SESSION);
  $server->handle();

?>

class.bar.php
--------------
<?php

  class Bar  {
    public $var = 0;

    public function login() {
      return session_id();
    }

    public function incVar() {
      $this->var++;
      return $this->var;
    }
  }

?>





Expected result:
----------------
1
2
3
4
5


Actual result:
--------------
1
1
1
1
1