session path: how to?

[Connie]

Are you using session.save_path?

well the error message is:

Code:

is_writable() [function.is-writable]: open_basedir restriction in effect. File(/tmp) is not within the allowed path(s): (/var/www/xxxxx/html/:/var/www/xxxx/phptmp/:/var/www/web509/files/:/var/www/xxxx/atd/:/usr/share/php/) in /var/www/xxxx/html/plugins/mld-newsletter/swift/preferences.php on line 15

and this preferences.php says this:

PHP Code:

// Without these lines the default caching mechanism is "array" but this uses
// a lot of memory.
// If possible, use a disk cache to enable attaching large attachments etc
if (function_exists('sys_get_temp_dir') && is_writable(sys_get_temp_dir()))
{
  Swift_Preferences::getInstance()
    -> setTempDir(sys_get_temp_dir())
    -> setCacheType('disk');
} 


so that's where the error comes from, but I do not know where and how to define a better path ;=)