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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 |
|---|---|
| 917 | |
| 918 | /** |
| 919 | * Filters the available menu item types. |
| 920 | * |
| 921 | * @since 4.3.0 |
| 922 | * @since 4.7.0 Each array item now includes a `$type_label` in addition to `$title`, `$type`, and `$object`. |
| 923 | * |
| 924 | * @param array $item_types Navigation menu item types. |
| 925 | */ |
| 926 | $item_types = apply_filters( 'customize_nav_menu_available_item_types', $item_types ); |
| 927 | |
| 928 | return $item_types; |
| 929 | } |
| 930 | |
| 931 | /** |
| 932 | * Add a new `auto-draft` post. |
| 933 | * |
| 934 | * @since 4.7.0 |
| 935 | * |