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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 |
|---|---|
| 3270 | * according to the context, if the old theme exists or not. |
| 3271 | * If the old theme is missing, the parameter will be the slug |
| 3272 | * of the old theme. |
| 3273 | * |
| 3274 | * @since 3.3.0 |
| 3275 | * |
| 3276 | * @param string $old_name Old theme name. |
| 3277 | * @param WP_Theme $old_theme WP_Theme instance of the old theme. |
| 3278 | */ |
| 3279 | do_action( 'after_switch_theme', $old_theme->get( 'Name' ), $old_theme ); |
| 3280 | } else { |
| 3281 | /** This action is documented in wp-includes/theme.php */ |
| 3282 | do_action( 'after_switch_theme', $stylesheet, $old_theme ); |
| 3283 | } |
| 3284 | flush_rewrite_rules(); |
| 3285 | |
| 3286 | update_option( 'theme_switched', false ); |
| 3287 | } |
| 3288 | } |
| 3289 | |
| 3290 | /** |
| 3291 | * Includes and instantiates the WP_Customize_Manager class. |