Despite being a PHP developer for a while, I'm just now getting my first taste of web services. I was hoping to get a little help, as the book I am using is not much help. One of the companies we are doing business with gave me an XML document in the format in needs to be in (I'll post a chunk of it). Due to my inexperience in this particular subject, I'm not really sure what to do. I need to know how to send this message to their live POST page, how to receive the response, and do I need to create any sort of WSDL page? Any help or direction would be so greatly appreciated, and please, don't just send a link to the php manual. I've obviously been there, as it is typically the go-to place for help.

```
POST /sample/order.asmx HTTP/1.1
Host: orders.sample.com
Content-Type: application/soap+xml; charset=utf-8
Content-Length: length

<?xml version="1.0" encoding="utf-8"?>
<soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
  <soap12:Header>
    <AuthenticationHeader xmlns="http://sample/">
      <Username>string</Username>
      <Password>string</Password>
    </AuthenticationHeader>
    <DebugHeader xmlns="http://sample/">
      <Debug>boolean</Debug>
      <Request>string</Request>
    </DebugHeader>
  </soap12:Header>
  <soap12:Body>
    <AddOrder xmlns="http://sample/">
      <order>
        <Header>
          <ID>string</ID>
          <EntryDate>dateTime</EntryDate>
          <OrderEntryView>
            <SeqID>int</SeqID>
            <Description>string</Description>
          </OrderEntryView>
          <ReferenceNumber>string</ReferenceNumber>
          <PONumber>string</PONumber>
          <Comments>string</Comments>
          <IpAddress>string</IpAddress>
        </Header>
      </order>
    </AddOrder>
  </soap12:Body>
</soap12:Envelope>

```

Above is the AddOrder XML document I was given (I removed most of the body). Please let me know if anymore detail is needed, as I want to be specific as possible so I'm able to figure out how send this