From:
Operating system: Ubuntu 10.04
PHP version: 5.3.2
Package: FTP related
Bug Type: Bug
Bug description:ftp_connect only uses DNS hostnames
Description:
------------
If "localhost" is present in /etc/hosts but does not resolve via DNS then
ftp_c\
onnect will not connect to it.
Most well setup DNS systems will have a "localhost." zone that resolves to
127.\
0.0.1, but this is not compulsory and some ISPs do not do this.
It is traditional for UNIX systems to be able to use local names as defined
in \
/etc/hosts for basic names resolution before DNS.
This bug does not appear to occur in other PHP network functions such as
IMAP o\
r SMTP, and did not appear in PHP 5.2.4 on Ubuntu 8.04 (and earlier).
I first noticed this bug when I upgrade a mail server from Ubuntu 8.04 to
Ubunt\
u 10.04 and the Squirrelmail autorespond plugin (which uses ftp_connect)
report\
ed a "failed to connect" error.
To replicate this problem you will have to test on a system that does not
resol\
ve "localhost" via DNS. Use the "host" command to check you can not do
this:
--------
$ host -v localhost
Trying "localhost.uk.fabit.net"
Trying "localhost"
Host localhost not found: 3(NXDOMAIN)
--------
Test script:
---------------
<?php
$ftp = ftp_connect($ftphost);
if (!$ftp) {
print "FTP connection failed";
}
?>
Expected result:
----------------
An ftp connection with no error message.
Actual result:
--------------
No ftp connection attempt and my error message "FTP connection failed".
--
Edit bug report at http://bugs.php.net/bug.php?id=52395&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=52395&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=52395&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=52395&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=52395&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=52395&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=52395&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=52395&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=52395&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=52395&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=52395&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=52395&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=52395&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=52395&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=52395&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=52395&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=52395&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=52395&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=52395&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=52395&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=52395&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=52395&r=mysqlcfg
