[wp-trac] [WordPress Trac] #9568: Allow users to log in using their email address

[WordPress Trac]

#9568: Allow users to log in using their email address
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 Reporter:  Denis-de-Bernardy                    |       Owner:
     Type:  feature request                      |      Status:  assigned
 Priority:  normal                               |   Milestone:  4.2
Component:  Users                                |     Version:  2.8
 Severity:  normal                               |  Resolution:
 Keywords:  has-patch needs-testing needs-       |     Focuses:
  refresh needs-unit-tests                       |
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Comment (by vhomenko):

 Please review the unit tests.

 Also, there is an UX issue: if the user enters a wrong email address at
 the login screen, there are two error messages displayed:
 {{{
 ERROR: Invalid username. Lost your password?
 ERROR: Invalid email address.
 }}}

 While the {{{wp_authenticate_email_password()}}} returns if the given
 email doesn't validate, making {{{wp_authenticate_username_password()}}}
 do a similar check seems non-trivial to me.

 I'd propose using the {{{wp_login_errors}}} filter, that's applied in the
 end of the wp-login.php, to purge the {{{'invalid_username'}}} entry, if
 there is {{{'invalid_email'}}}, in the WP_Error object.

 If that's acceptable, then where would be a good place to put the callback
 function?

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Ticket URL: <https://core.trac.wordpress.org/ticket/9568#comment:70>
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