Description:
------------
I've found a bug report like this but it was with state closed.
This _is_ a bug or at least a lack of features.

There must be a way to set tmp-file creation of this functions, but
setting TMPDIR environment variable doesn't work each time. I don't want to
include /tmp dir in open_basedir directories.

Reproduce code:
---------------
<?php
putenv('TMPDIR=/home/vhosts/test.com/httpd/tmp');
echo getenv('TMPDIR');
$cnid = ftp_connect("example.com");
$login_result = ftp_login($cnid, "user", "pass");
$out = ftp_rawlist($cnid, '/');
ftp_close($cnid);
print_r($out);
?>

Expected result:
----------------
listing of files


Actual result:
--------------
/home/vhosts/test.com/httpd/tmp
Warning: ftp_rawlist() [function.ftp-rawlist]: open_basedir restriction
in effect. File(/tmp) is not within the allowed path(s):
(/home/vhosts/test.com/httpd/tmp:/usr/lib/php:/usr/local/lib/php) in
/home/vhosts/test.com/httpd/tmphtdocs/a.php on line 15

Warning: ftp_rawlist() [function.ftp-rawlist]: Unable to create
temporary file. Check permissions in temporary files directory. in
/home/vhosts/test.com/httpd/htdocs/a.php on line 15
bool(false)