----- Original Message -----
From: "Steve Edberg" <sbedberg@xxxxxxxxxxx>
To: "Gustav Wiberg" <gustav@xxxxxxxxxxxxxx>; "PHP General"
<php-general@xxxxxxxxxxxxx>
Sent: Sunday, January 29, 2006 10:51 PM
Subject: Re: PHP on domain...
At 10:08 PM +0100 1/29/06, Gustav Wiberg wrote:
Hi guys!
How can you check if a domain (that you don't own), can run PHP-code?
Is it possible?
/G
@varupiraten.se
Answer 1:
Call them, fax them, email them, IM them, or check their website. This is
the only way to know for sure.
Answer 2:
Check http://netcraft.com/
I don't know all the tools they use to record server information, but I
presume that it includes methods like Answer 3 below.
Answer 3:
If you want to do this via a program, the answer is - in general, no.
However, many servers will return an HTTP header containing this info.
Also, (at least on Apache) server signatures may be set to reveal this
info on error displays. You could open a socket connection to port 80 of
the desired domain, and issue a HEAD request. You'll have to parse the
results for Server and/or X-Powered-By and possibly other headers. Here's
some examples via telnet:
telnet <domain deleted> 80
Trying <ip address deleted>...
Connected to <domain deleted>.
Escape character is '^]'.
HEAD / HTTP/1.0
HTTP/1.0 200 OK
Date: Sun, 29 Jan 2006 21:23:03 GMT
Server: Apache
Content-Type: text/html
Connection: close
telnet <domain deleted> 80
Trying <ip address deleted>...
Connected to <domain deleted>.
Escape character is '^]'.
HEAD / HTTP/1.0
HTTP/1.1 403 Access Forbidden
Server: Microsoft-IIS/5.0
Date: Sun, 29 Jan 2006 21:32:26 GMT
Content-Length: 4126
Content-Type: text/html
telnet <domain deleted> 80
Trying <ip address deleted>...
Connected to <domain deleted>.
Escape character is '^]'.
HEAD / HTTP/1.0
HTTP/1.0 302 Moved Temporarily
Date: Sun, 29 Jan 2006 21:36:52 GMT
Server: Apache/1.3.33 (Unix) PHP/4.3.10 mod_ssl/2.8.22 OpenSSL/0.9.7e
X-Powered-By: PHP/4.3.10
Location: index_html.html
Content-Type: text/html
Connection: close
However, many servers are set to not reveal this info for security
purposes; it could also be spoofed for the same reason. For example, the
second site above (the IIS one) actually *does* support PHP according to
their website. See
http://www.php.net/manual/en/ref.sockets.php
for info on opening & reading from sockets; there is an example on this
page in the user comments about sending HTTP HEAD requests.
steve
--
+--------------- my people are the people of the dessert, ---------------+
| Steve Edberg http://pgfsun.ucdavis.edu/ |
| UC Davis Genome Center sbedberg@xxxxxxxxxxx |
| Bioinformatics programming/database/sysadmin (530)754-9127 |
+---------------- said t e lawrence, picking up his fork ----------------+
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Hi there!
Thanx for info!
/G
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