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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 |
---|---|
826 | * Fires after the theme is switched. |
827 | * |
828 | * @since 1.5.0 |
829 | * @since 4.5.0 Introduced the `$old_theme` parameter. |
830 | * |
831 | * @param string $new_name Name of the new theme. |
832 | * @param WP_Theme $new_theme WP_Theme instance of the new theme. |
833 | * @param WP_Theme $old_theme WP_Theme instance of the old theme. |
834 | */ |
835 | do_action( 'switch_theme', $new_name, $new_theme, $old_theme ); |
836 | } |
837 |
|
838 | /** |
839 | * Checks that the active theme has the required files. |
840 | * |
841 | * Standalone themes need to have a `templates/index.html` or `index.php` template file. |
842 | * Child themes need to have a `Template` header in the `style.css` stylesheet. |
843 | * |
844 | * Does not initially check the default theme, which is the fallback and should always exist. |