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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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676 | } |
677 |
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678 | /** |
679 | * Filter the available menu item types. |
680 | * |
681 | * @since 4.3.0 |
682 | * |
683 | * @param array $item_types Custom menu item types. |
684 | */ |
685 | $item_types = apply_filters( 'customize_nav_menu_available_item_types', $item_types ); |
686 |
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687 | return $item_types; |
688 | } |
689 |
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690 | /** |
691 | * Print the JavaScript templates used to render Menu Customizer components. |
692 | * |
693 | * Templates are imported into the JS use wp.template. |
694 | * |