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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 |
|---|---|
| 988 | $scheme = 'logged_in'; |
| 989 | } else { |
| 990 | /** |
| 991 | * Filter the authentication redirect scheme. |
| 992 | * |
| 993 | * @since 2.9.0 |
| 994 | * |
| 995 | * @param string $scheme Authentication redirect scheme. Default empty. |
| 996 | */ |
| 997 | $scheme = apply_filters( 'auth_redirect_scheme', '' ); |
| 998 | } |
| 999 | |
| 1000 | if ( $user_id = wp_validate_auth_cookie( '', $scheme) ) { |
| 1001 | /** |
| 1002 | * Fires before the authentication redirect. |
| 1003 | * |
| 1004 | * @since 2.8.0 |
| 1005 | * |
| 1006 | * @param int $user_id User ID. |