Description:
------------
Warning: touch(): open_basedir restriction in effect. File(/tmp/f5_test) is not within the allowed path(s): (/home/sites/site15/:/tmp) in /home/sites/site15/web/write_tmp.php on line 3

Warning: fopen(): open_basedir restriction in effect. File(/tmp/f5_test) is not within the allowed path(s): (/home/sites/site15/:/tmp) in /home/sites/site15/web/write_tmp.php on line 4

Warning: fopen(/tmp/f5_test): failed to open stream: Operation not permitted in /home/sites/site15/web/write_tmp.php on line 4

Warning: fwrite(): supplied argument is not a valid stream resource in /home/sites/site15/web/write_tmp.php on line 5

Warning: fclose(): supplied argument is not a valid stream resource in /home/sites/site15/web/write_tmp.php on line 6

Reproduce code:
---------------
--8<--[ write_tmp.php ]--8<--
<?php
$tmpfile = "/tmp/f5_test";
touch($tmpfile);
$fp = fopen("$tmpfile","w");
fwrite($fp, "test ....");
fclose($fp);
?>
--8<--[ httpd.conf ]--8<--
<DirectoryMatch "/home/sites/site15/">
## doesn't work
php_admin_value open_basedir /home/sites/site15/:/tmp
## also doesn't work
# php_admin_value open_basedir /
## works, but is not what's desired
# php_admin_value open_basedir none
</DirectoryMatch>
--8<--
Also tried to set open_basedir within the VirtualHost, didn'
t work either.

Expected result:
----------------
no errors

Actual result:
--------------
open_basedir errors