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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 |
|---|---|
| 876 | |
| 877 | /** |
| 878 | * Filters the login page errors. |
| 879 | * |
| 880 | * @since 3.6.0 |
| 881 | * |
| 882 | * @param object $errors WP Error object. |
| 883 | * @param string $redirect_to Redirect destination URL. |
| 884 | */ |
| 885 | $errors = apply_filters( 'wp_login_errors', $errors, $redirect_to ); |
| 886 | |
| 887 | // Clear any stale cookies. |
| 888 | if ( $reauth ) |
| 889 | wp_clear_auth_cookie(); |
| 890 | |
| 891 | login_header(__('Log In'), '', $errors); |
| 892 | |
| 893 | if ( isset($_POST['log']) ) |
| 894 | $user_login = ( 'incorrect_password' == $errors->get_error_code() || 'empty_password' == $errors->get_error_code() ) ? esc_attr(wp_unslash($_POST['log'])) : ''; |