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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 |
|---|---|
| 264 | /** |
| 265 | * Filters whether to enable custom ordering of the administration menu. |
| 266 | * |
| 267 | * See the {@see 'menu_order'} filter for reordering menu items. |
| 268 | * |
| 269 | * @since 2.8.0 |
| 270 | * |
| 271 | * @param bool $custom Whether custom ordering is enabled. Default false. |
| 272 | */ |
| 273 | if ( apply_filters( 'custom_menu_order', false ) ) { |
| 274 | $menu_order = array(); |
| 275 | foreach ( $menu as $menu_item ) { |
| 276 | $menu_order[] = $menu_item[2]; |
| 277 | } |
| 278 | unset( $menu_item ); |
| 279 | $default_menu_order = $menu_order; |
| 280 | |
| 281 | /** |
| 282 | * Filters the order of administration menu items. |