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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
487 | if ( $user == null ) { |
488 | // TODO what should the error message be? (Or would these even happen?) |
489 | // Only needed if all authentication handlers fail to return anything. |
490 | $user = new WP_Error('authentication_failed', __('<strong>ERROR</strong>: Invalid username or incorrect password.')); |
491 | } |
492 |
|
493 | $ignore_codes = array('empty_username', 'empty_password'); |
494 |
|
495 | if (is_wp_error($user) && !in_array($user->get_error_code(), $ignore_codes) ) { |
496 | do_action('wp_login_failed', $username); |
497 | } |
498 |
|
499 | return $user; |
500 | } |
501 | endif; |
502 |
|
503 | if ( !function_exists('wp_logout') ) : |
504 | /** |
505 | * Log the current user out. |