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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 2890 | * according to the context, if the old theme exists or not. |
| 2891 | * If the old theme is missing, the parameter will be the slug |
| 2892 | * of the old theme. |
| 2893 | * |
| 2894 | * @since 3.3.0 |
| 2895 | * |
| 2896 | * @param string $old_name Old theme name. |
| 2897 | * @param WP_Theme $old_theme WP_Theme instance of the old theme. |
| 2898 | */ |
| 2899 | do_action( 'after_switch_theme', $old_theme->get( 'Name' ), $old_theme ); |
| 2900 | } else { |
| 2901 | /** This action is documented in wp-includes/theme.php */ |
| 2902 | do_action( 'after_switch_theme', $stylesheet, $old_theme ); |
| 2903 | } |
| 2904 | flush_rewrite_rules(); |
| 2905 | |
| 2906 | update_option( 'theme_switched', false ); |
| 2907 | } |
| 2908 | } |
| 2909 | |
| 2910 | /** |
| 2911 | * Includes and instantiates the WP_Customize_Manager class. |