php - PHPを介してxmlをリクエストする方法-cURLPOSTリクエスト

Question

PHP-cURLスクリプトで次のリクエストを実行したいと思います。

http://site5.way2sms.com/QuickContacts
POST /QuickContacts HTTP/1.1
Host: site5.way2sms.com
User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:8.0) Gecko/20100101 Firefox/8.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip, deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Connection: keep-alive
X-Requested-With: XMLHttpRequest
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Referer: http://site5.way2sms.com/Main.action?id=0CD36BD332A5C7AE77FDBA1CBDBFFBB6.w809
Content-Length: 16   
gads=ID=e2cdae9b764355fa:T=1333862873:S=ALNI_MYvxochQ56ILMvBDr4oyyqCIDVn3w
Pragma: no-cache
Cache-Control: no-cache
folder=DashBoard
HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Content-Type: text/html
Content-Length: 1901
Date: Sun, 08 Apr 2012 06:07:52 GMT
Connection: close                            

返されるコンテンツはXML形式だと思います。それらをどのように処理しますか？