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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 |
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918 |
|
919 | /** |
920 | * Filters the available menu item types. |
921 | * |
922 | * @since 4.3.0 |
923 | * @since 4.7.0 Each array item now includes a `$type_label` in addition to `$title`, `$type`, and `$object`. |
924 | * |
925 | * @param array $item_types Navigation menu item types. |
926 | */ |
927 | $item_types = apply_filters( 'customize_nav_menu_available_item_types', $item_types ); |
928 |
|
929 | return $item_types; |
930 | } |
931 |
|
932 | /** |
933 | * Adds a new `auto-draft` post. |
934 | * |
935 | * @since 4.7.0 |
936 | * |