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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 |
---|---|
686 | } |
687 |
|
688 | /** |
689 | * Fires once the Customizer theme preview has started. |
690 | * |
691 | * @since 3.4.0 |
692 | * |
693 | * @param WP_Customize_Manager $this WP_Customize_Manager instance. |
694 | */ |
695 | do_action( 'start_previewing_theme', $this ); |
696 | } |
697 |
|
698 | /** |
699 | * Stop previewing the selected theme. |
700 | * |
701 | * Removes filters to change the current theme. |
702 | * |
703 | * @since 3.4.0 |
704 | */ |