<?
$username = 'web_service';
$password = 'webadmin';

$result = '';
try {
    $client= new SoapClient('http://69.70.226.251/InfoBase1/ws/test_ws1.1cws?wsdl',

    array('location'=>'http://69.70.226.251/InfoBase1/ws/test_ws1.1cws','login' => $username,

                'password' => $password));

    try
    {
        $result.=$client->CheckUserNameExist(array('UserName'=>$username))->return;
    }
    catch (Exception $e)
    {
        $result.='Caught exception: '.$e->getMessage()."\n";
    };

}
catch (Exception $e)
{
    $result.= 'Caught exception: '. $e->getMessage()."\n";
};

echo $result;
?>