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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 |
|---|---|
| 243 | /** |
| 244 | * Filter whether to enable custom ordering of the administration menu. |
| 245 | * |
| 246 | * See the {@see 'menu_order'} filter for reordering menu items. |
| 247 | * |
| 248 | * @since 2.8.0 |
| 249 | * |
| 250 | * @param bool $custom Whether custom ordering is enabled. Default false. |
| 251 | */ |
| 252 | if ( apply_filters( 'custom_menu_order', false ) ) { |
| 253 | $menu_order = array(); |
| 254 | foreach ( $menu as $menu_item ) { |
| 255 | $menu_order[] = $menu_item[2]; |
| 256 | } |
| 257 | unset($menu_item); |
| 258 | $default_menu_order = $menu_order; |
| 259 | |
| 260 | /** |
| 261 | * Filter the order of administration menu items. |