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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 |
|---|---|
| 192 | // Remove this menu from any locations. |
| 193 | $locations = get_nav_menu_locations(); |
| 194 | foreach ( $locations as $location => $menu_id ) { |
| 195 | if ( $menu_id == $menu->term_id ) |
| 196 | $locations[ $location ] = 0; |
| 197 | } |
| 198 | set_theme_mod( 'nav_menu_locations', $locations ); |
| 199 | |
| 200 | if ( $result && !is_wp_error($result) ) |
| 201 | do_action( 'wp_delete_nav_menu', $menu->term_id ); |
| 202 | |
| 203 | return $result; |
| 204 | } |
| 205 | |
| 206 | /** |
| 207 | * Save the properties of a menu or create a new menu with those properties. |
| 208 | * |
| 209 | * @since 3.0.0 |
| 210 | * |