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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 |
|---|---|
| 47 | // Shake it! |
| 48 | $shake_error_codes = array( 'empty_password', 'empty_email', 'invalid_email', 'invalidcombo', 'empty_username', 'invalid_username', 'incorrect_password', 'retrieve_password_email_failure' ); |
| 49 | /** |
| 50 | * Filters the error codes array for shaking the login form. |
| 51 | * |
| 52 | * @since 3.0.0 |
| 53 | * |
| 54 | * @param array $shake_error_codes Error codes that shake the login form. |
| 55 | */ |
| 56 | $shake_error_codes = apply_filters( 'shake_error_codes', $shake_error_codes ); |
| 57 | |
| 58 | if ( $shake_error_codes && $wp_error->has_errors() && in_array( $wp_error->get_error_code(), $shake_error_codes, true ) ) { |
| 59 | add_action( 'login_head', 'wp_shake_js', 12 ); |
| 60 | } |
| 61 | |
| 62 | $login_title = get_bloginfo( 'name', 'display' ); |
| 63 | |
| 64 | /* translators: Login screen title. 1: Login screen name, 2: Network or site name. */ |
| 65 | $login_title = sprintf( __( '%1$s ‹ %2$s — WordPress' ), $title, $login_title ); |