how to debug these warnings 1

[praywin]

Hi, I've been getting this error intermitently. It goes away with a reload but every couple of days I see this warning. Since it is not reproducible easily I haven't been able to track it down.

Has anyone see such type of warnings? Any ideas how to go about debugging this?

Warning: readfile(): php_network_getaddresses: getaddrinfo failed:

 

[ingresman]

Can you show us a code fragment? I suspect your trying to open a file via HTTP

 

[sleipnir214]

I agree with ingresman on both counts. That you should show us what your code is doing and that you're trying to use readfile() with a URL.

The problem, if you are using readfile() with a URL is that PHP was not able to resolve the address in the URL. As DNS is a distributed database, problems in many places on the internet can caus DN resolution failures.

Want the best answers? Ask the best questions!

TANSTAAFL!!

 

[praywin]

I admit guys, my question doesn't have much details.

Its a pretty simple code fragment

readfile(/home/some/dir/abc.php)

which I use to include a header in on a page. The file is in the proper place (its on the same server) and the script works well and doesn't have errors etc. (its been in use for a long time).

Its just that it just fails sometimes and issues the warning, goes away with a couple of reloads and you don't see it for some time. The problem is a lot of users see it and I'd love if I could fix it soon. To make matters worse I can't reproduce it every time.

Maybe its just some problem on the ISP side and doesn't have anything to do with the php script. I just want to know if anyone has seen such problem before as I'm kind of at loss how to go about resolving it.

 

[praywin]

Oops sorry it should have been

readfile(

http://www.mysite.com/some/dir/abc.php)

 

[ericbrunson]

If the file is actually on the same server, then don't use the "

http://sitename"

part. If it isn't, but the info is (mostly) static, copy it locally. That's an expensive call to include headers every time.

 

[predamarcel]

in any case it is a DNS problem: sometimes your server can not resolve the name of "

http://www.mysite.com".

If

http://www.mysite.com

has a static IP, you have 2 choices:
#1 - the faster - use readfile(

http://1.2.3.4/some/dir/abc.php)

#2 if for some reasn you can not use #1 ( on

http://www.mysite.com

could be some VirtualHost(s) ), you can add an entry in /etc/hosts file, about

http://www.mysite.com

.


HTH


___

http://marcel.4x4.ro/

____

 

[ingresman]

Just out of interest why are you trying to do it via HTTP ?

 

[praywin]

Thanks guys, I guess I can avoid the error if I read it using the absolute path on the server than going through HTTP.

 

[sleipnir214]

It's just a good idea to always use filesystem paths when opening a file on your own server:[ul][li]as you have found, it's more realiable, as your script is not dependent on as many outside systems to operate[/li][li]it uses fewer server resources, as the communication does not have to go through the local web server[/li][li]It's faster, as your script does not have to wait on DNS to operate[/li][li]since PHP's filesystem functions, when used with filesystem paths, is not constrainted by a web site's document root, your script can access files that may not be available on a web site.[/li][/ul]

Want the best answers? Ask the best questions!

TANSTAAFL!!