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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 |
---|---|
688 | } |
689 |
|
690 | /** |
691 | * Fires once the Customizer theme preview has started. |
692 | * |
693 | * @since 3.4.0 |
694 | * |
695 | * @param WP_Customize_Manager $manager WP_Customize_Manager instance. |
696 | */ |
697 | do_action( 'start_previewing_theme', $this ); |
698 | } |
699 |
|
700 | /** |
701 | * Stops previewing the selected theme. |
702 | * |
703 | * Removes filters to change the active theme. |
704 | * |
705 | * @since 3.4.0 |
706 | */ |