$client = new SoapClient('http://localhost/service.asmx?WSDL', array('trace' => 1));
$result = $client->FindAdv(array(
'login' => 123,
'password' => 'qwerty',
'search' => 'abc'));

[19] => struct FindAdv{ long login; string password; SearchType search; }
[20] => string SearchType

<s:element name="FindAdv">
 <s:complexType>
  <s:sequence>
   <s:element minOccurs="1" maxOccurs="1" name="login" type="s:long"/>
   <s:element minOccurs="0" maxOccurs="1" name="password" type="s:string"/>
   <s:element minOccurs="1" maxOccurs="1" name="search" type="tns:SearchType"/>
  </s:sequence>
 </s:complexType>
</s:element>

<s:simpleType name="SearchType">
 <s:restriction base="s:string">
  <s:enumeration value="Val"/>
  <s:enumeration value="AllVal"/>
 </s:restriction>
</s:simpleType>

$client = new SoapClient('http://localhost/service.asmx?WSDL', array('trace' => 1));
$result = $client->FindAdv(array(
'login' => 123,
'password' => 'qwerty',
'search' => '0'));