php -v

PHP 5.3.8 (cli) (built: Aug 23 2011 12:14:39)
Copyright (c) 1997-2011 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2011 Zend Technologies

php -f curl-testcase.php

* About to connect() to stackoverflow.com port 80 (#0)
*   Trying 64.34.119.12... * connected
* Connected to stackoverflow.com (64.34.119.12) port 80 (#0)
> GET / HTTP/1.1
Host: stackoverflow.com
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0.2) Gecko/20100101 Firefox
/6.0.2
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-gb,en;q=0.5
Accept-Encoding: gzip, deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Proxy-Connection: Close
Cookie: PREF=ID=2bb051bfbf00e95b:U=c0bb604
Cache-Control: max-age=0
Connection: Close

< HTTP/1.1 200 OK
< Cache-Control: public, max-age=43
< Content-Type: text/html; charset=utf-8
< Content-Encoding: gzip
< Expires: Sat, 03 Mar 2012 10:01:04 GMT
< Last-Modified: Sat, 03 Mar 2012 10:00:04 GMT
< Vary: *
< Date: Sat, 03 Mar 2012 10:00:20 GMT
< Connection: close
< Content-Length: 32482
<
* Closing connection #0