[wp-trac] [WordPress Trac] #35598: Use different error code for PHPMailer exceptions in wp_mail_failed

[WordPress Trac]

#35598: Use different error code for PHPMailer exceptions in wp_mail_failed
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 Reporter:  Kau-Boy                   |       Owner:
     Type:  defect (bug)              |      Status:  new
 Priority:  normal                    |   Milestone:  Future Release
Component:  Mail                      |     Version:  4.4.1
 Severity:  normal                    |  Resolution:
 Keywords:  has-patch has-unit-tests  |     Focuses:
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Comment (by Kau-Boy):

 Changing the `empty` check in the `WP_Error` might have many side effects,
 I would guess. As usually the first parameter used for `WP_Error` is a
 static string, I found this the optimal solution (I couldn't find a single
 usage in core not using a static string).

 The PhpMailer only uses numeric error codes of 0, 1 and 2 which doesn't
 really add too much useful information.

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Ticket URL: <https://core.trac.wordpress.org/ticket/35598#comment:12>
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