PHP4 network functions

[Mike M]

Seasons greetings folks

I'm pretty sure that this problem has nothing to do with PHP and a whole lot
to do with my server config, but I've got no idea where to start.

On my server I can't get any of the network functions to work, eg getmxrr()
returns an empty array whereas on another server it will return a populated
array.

Sendmail functions perfectly and I can ping the remote machines, so it's not
a problem with iptables stopping outgoing traffic, or with named.

Is anyone able to send me in the right direction ?

TIA
Mike

[Adam Nørregaard]

>

Is anyone able to send me in the right direction ?

Maybe your server has a firewall which blocks the ports that these
PHP/network-commands use?

[Mike M]

Adam Nørregaard wrote:

Is anyone able to send me in the right direction ?

Maybe your server has a firewall which blocks the ports that these
PHP/network-commands use?

Nope, not unless Mandrake has set up its own firewall ...
[root@fred root]# iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination

Chain FORWARD (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

[Pedro Graca]

Mike M wrote:

I'm pretty sure that this problem has nothing to do with PHP and a whole lot
to do with my server config, but I've got no idea where to start.

On my server I can't get any of the network functions to work, eg getmxrr()
returns an empty array whereas on another server it will return a populated
array.

What happens when you try

$ host -t MX yahoo.com

I did it right now and got:
yahoo.com mail is handled by 1 mx1.mail.yahoo.com.
yahoo.com mail is handled by 1 mx2.mail.yahoo.com.
yahoo.com mail is handled by 5 mx4.mail.yahoo.com.

But, on my machine, php's getmxrr() works as expected :)
$ php -v
PHP 4.3.3 (cli) (built: Nov 19 2003 23:12:29)
Copyright (c) 1997-2003 The PHP Group
Zend Engine v1.3.0, Copyright (c) 1998-2003 Zend Technologies
--
--= my mail box only accepts =--
--= Content-Type: text/plain =--
--= Size below 10001 bytes =--

[Manuel Lemos]

Hello,

On 12/30/2003 10:41 AM, Mike M wrote:

Seasons greetings folks

I'm pretty sure that this problem has nothing to do with PHP and a whole lot
to do with my server config, but I've got no idea where to start.

On my server I can't get any of the network functions to work, eg getmxrr()
returns an empty array whereas on another server it will return a populated
array.

Sendmail functions perfectly and I can ping the remote machines, so it's not
a problem with iptables stopping outgoing traffic, or with named.

Is anyone able to send me in the right direction ?

Your DNS is probably not allowing to forward requests, i.e. only
responds for requests about you machine domains.

In that case you may want to try this DNS resolver class that lets you
configures some other (open) DNS to ask about other domains. It comes
with GetMXRR() emulation function.

Class: DNSResolver
http://www.phpclasses.org/phpresolver

This class also has been used by this other e-mail address validation
class to handle situations when GetMXRR() is not function, like for
instance under Windows or when in DNS forwarding is disabled as it seems
to be your case.

Class: E-mail address validation class
http://www.phpclasses.org/emailvalidation

--

Regards,
Manuel Lemos

Free ready to use OOP components written in PHP
http://www.phpclasses.org/

[Mike M]

Pedro Graca wrote:

Mike M wrote:

I'm pretty sure that this problem has nothing to do with PHP and a whole
lot to do with my server config, but I've got no idea where to start.

On my server I can't get any of the network functions to work, eg
getmxrr() returns an empty array whereas on another server it will return
a populated array.
What happens when you try

$ host -t MX yahoo.com

I did it right now and got:
yahoo.com mail is handled by 1 mx1.mail.yahoo.com.
yahoo.com mail is handled by 1 mx2.mail.yahoo.com.
yahoo.com mail is handled by 5 mx4.mail.yahoo.com.

But, on my machine, php's getmxrr() works as expected :)

Now I'm *really* confused ...

[meetakiwi@fred meetakiwi]$ host -t MX yahoo.com
yahoo.com mail is handled by 1 mx1.mail.yahoo.com.
yahoo.com mail is handled by 1 mx2.mail.yahoo.com.
yahoo.com mail is handled by 5 mx4.mail.yahoo.com.
[meetakiwi@fred meetakiwi]$ host -t MX xtra.co.nz
xtra.co.nz mail is handled by 10 mta.xtra.co.nz.

Is it possible that PHP thinks it's on a Windows machine instead of Linux ?
okay, I'm clutching at straws here !

Cheers
Mike


$ php -v
PHP 4.3.3 (cli) (built: Nov 19 2003 23:12:29)
Copyright (c) 1997-2003 The PHP Group
Zend Engine v1.3.0, Copyright (c) 1998-2003 Zend Technologies

[Pedro Graca]

Mike M wrote:

Now I'm *really* confused ... [meetakiwi@fred meetakiwi]$ host -t MX xtra.co.nz
xtra.co.nz mail is handled by 10 mta.xtra.co.nz. Is it possible that PHP thinks it's on a Windows machine instead of Linux ?
okay, I'm clutching at straws here !

lol
Are you sure you didn't somehow change the host name?

$ php -r 'if(getmxrr("xtra.co.nz2", $a)) print_r($a); else echo "FALSE\n";'
FALSE

$ php -r 'if(getmxrr("xtra.co.nz", $a)) print_r($a); else echo "FALSE\n";'
Array
(
[0] => mta.xtra.co.nz
)
--
--= my mail box only accepts =--
--= Content-Type: text/plain =--
--= Size below 10001 bytes =--

[Mike M]

Pedro Graca wrote:

Mike M wrote:

Now I'm *really* confused ...

[meetakiwi@fred meetakiwi]$ host -t MX xtra.co.nz
xtra.co.nz mail is handled by 10 mta.xtra.co.nz.

Is it possible that PHP thinks it's on a Windows machine instead of Linux
? okay, I'm clutching at straws here !

lol
Are you sure you didn't somehow change the host name?

$ php -r 'if(getmxrr("xtra.co.nz2", $a)) print_r($a); else echo
"FALSE\n";' FALSE

$ php -r 'if(getmxrr("xtra.co.nz", $a)) print_r($a); else echo "FALSE\n";'
Array
(
[0] => mta.xtra.co.nz
)

*YAYYYYYYYYYYYYYYY* !!!
Thank you !!! It turns out that for getmxrr() to work under Apache, the
server directive HostnameLookups must be On, not Off !

Thanks Pedro :-) May you have a wonderful New Year :-)