array_flip() warning when adding module setting

Grr!!! Thought I fixed this. How exactly did you manage to make this error re-appear?

I can't reproduce this. Are you still experiencing this problem? If so, try clearing the mail_system variable.

From the command line

mysql DRUPALDATABASE -e 'delete from variable where name="mail_system"'

From a PHP-Filtered Drupal page

variable_del('mail_system');

A third option should be completely uninstalling Mail System but alas I hadn't anticipated the need and therefore haven't coded the mailsystem_uninstall() hook.

EDIT: Wrote the hook but didn't roll a new release just yet.

gonna call this one fixed in 6.x-1.11 unless somebody re-opens.

Got the same error, on line 159 with version = "7.x-1.x-dev" fo 12-4-2011.
- install module for first time, add new setting, save.

@#2: a simpler way to delete the variable and reproduce the error:
- activate devel
- go to /devel/variable, or choose Variable editor from Admin menu.
- select the variable mail_system, go down, and press [delete]

7.x-1.x is no longer supported.

@#6: I don't understand: there are new D7-versions from 10 and 12 april, and this module is a prerequisite of D7-version of http://drupal.org/project/htmlmail

I'm getting this error with 6.x.1.11 every time I add a new module.

I have been using HTML Mail in debug mode to try and ID the modules and $keys. I have never received a $key value, so I leave the field blank. When I select a new module, i.e. messaging > messaging and click Save I get the error message:

warning: array_flip() [function.array-flip]: Can only flip STRING and INTEGER values! in /var/www/html/drupal/sites/all/modules/mailsystem/mailsystem.admin.inc on line 142.

I then go to the new module and select HTMLMailSystem and click save and I get the error again. If I click save one more time it goes away.

The backtrace info follows:

Type	backtrace
Date	Tuesday, April 12, 2011 - 5:33pm
User	admin
Location	http://www.e-kehila.org/admin/settings/mailsystem
Referrer	http://www.e-kehila.org/admin/settings/mailsystem
Message	Type: php
array_flip() [<a href='function.array-flip'>function.array-flip</a>]: Can only flip STRING and INTEGER values! in /var/www/html/drupal/sites/all/modules/mailsystem/mailsystem.admin.inc on line 142.
Backtrace:
array_flip(a:1:{i:0;a:3:{s:14:"default-system";s:17:"DefaultMailSystem";s:9:"messaging";s:14:"HTMLMailSystem";s:5:"rules";N;}})[mailsystem.admin.inc:142];
.mailsystem_get_classes(a:1:{i:0;a:3:{s:14:"default-system";s:17:"DefaultMailSystem";s:9:"messaging";s:14:"HTMLMailSystem";s:5:"rules";N;}})[mailsystem.admin.inc:13];
..mailsystem_admin_settings(a:1:{i:0;a:3:{s:7:"storage";N;s:9:"submitted";b:0;s:4:"post";a:6:{s:10:"mailsystem";a:3:{s:14:"default-system";s:17:"DefaultMailSystem";s:9:"messaging";s:14:"HTMLMailSystem";s:5:"rules";s:14:"HTMLMailSystem";}s:10:"identifier";a:2:{s:6:"module";s:1:"0";s:3:"key";s:0:"";}s:2:"op";s:13:"Save settings";s:13:"form_build_id";s:37:"form-f5724858f85b39efa92845035b4ca79e";s:10:"form_token";s:32:"6c2eeac0e86e928aceedad00bb87d40d";s:7:"form_id";s:25:"mailsystem_admin_settings";}}})[?:?];
...call_user_func_array(a:2:{i:0;s:25:"mailsystem_admin_settings";i:1;a:1:{i:0;a:3:{s:7:"storage";N;s:9:"submitted";b:0;s:4:"post";a:6:{s:10:"mailsystem";a:3:{s:14:"default-system";s:17:"DefaultMailSystem";s:9:"messaging";s:14:"HTMLMailSystem";s:5:"rules";s:14:"HTMLMailSystem";}s:10:"identifier";a:2:{s:6:"module";s:1:"0";s:3:"key";s:0:"";}s:2:"op";s:13:"Save settings";s:13:"form_build_id";s:37:"form-f5724858f85b39efa92845035b4ca79e";s:10:"form_token";s:32:"6c2eeac0e86e928aceedad00bb87d40d";s:7:"form_id";s:25:"mailsystem_admin_settings";}}}})[form.inc:378];
....drupal_retrieve_form(a:2:{i:0;s:25:"mailsystem_admin_settings";i:1;a:3:{s:7:"storage";N;s:9:"submitted";b:0;s:4:"post";a:6:{s:10:"mailsystem";a:3:{s:14:"default-system";s:17:"DefaultMailSystem";s:9:"messaging";s:14:"HTMLMailSystem";s:5:"rules";s:14:"HTMLMailSystem";}s:10:"identifier";a:2:{s:6:"module";s:1:"0";s:3:"key";s:0:"";}s:2:"op";s:13:"Save settings";s:13:"form_build_id";s:37:"form-f5724858f85b39efa92845035b4ca79e";s:10:"form_token";s:32:"6c2eeac0e86e928aceedad00bb87d40d";s:7:"form_id";s:25:"mailsystem_admin_settings";}}})[?:?];
.....call_user_func_array(a:2:{i:0;s:20:"drupal_retrieve_form";i:1;a:2:{i:0;s:25:"mailsystem_admin_settings";i:1;a:3:{s:7:"storage";N;s:9:"submitted";b:0;s:4:"post";a:6:{s:10:"mailsystem";a:3:{s:14:"default-system";s:17:"DefaultMailSystem";s:9:"messaging";s:14:"HTMLMailSystem";s:5:"rules";s:14:"HTMLMailSystem";}s:10:"identifier";a:2:{s:6:"module";s:1:"0";s:3:"key";s:0:"";}s:2:"op";s:13:"Save settings";s:13:"form_build_id";s:37:"form-f5724858f85b39efa92845035b4ca79e";s:10:"form_token";s:32:"6c2eeac0e86e928aceedad00bb87d40d";s:7:"form_id";s:25:"mailsystem_admin_settings";}}}})[form.inc:104];
......drupal_get_form(a:1:{i:0;s:25:"mailsystem_admin_settings";})[?:?];
.......call_user_func_array(a:2:{i:0;s:15:"drupal_get_form";i:1;a:1:{i:0;s:25:"mailsystem_admin_settings";}})[menu.inc:348];
........menu_execute_active_handler(a:0:{})[index.php:18];
.........index.php
Severity	notice
Hostname	108.18.211.72
Operations	

Oops! sorry. The 1.x branch of htmlmail is no longer supported. Of course the 1.x branch of Mail System is.

Thanks for the informative backtrace. I see the problem -- the value for the 'rules' key is set to NULL, and NULL cannot be the key of an array.

Will roll a new release shortly.

Fixed by 7.x-1.12 release.

Thanks everyone once again for your patience. Your feedback is helping make this project better!

Error message gone in 6.x