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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 |
|---|---|
| 173 | |
| 174 | /** |
| 175 | * Filters response of WP_Customize_Panel::active(). |
| 176 | * |
| 177 | * @since 4.1.0 |
| 178 | * |
| 179 | * @param bool $active Whether the Customizer panel is active. |
| 180 | * @param WP_Customize_Panel $panel WP_Customize_Panel instance. |
| 181 | */ |
| 182 | $active = apply_filters( 'customize_panel_active', $active, $panel ); |
| 183 | |
| 184 | return $active; |
| 185 | } |
| 186 | |
| 187 | /** |
| 188 | * Default callback used when invoking WP_Customize_Panel::active(). |
| 189 | * |
| 190 | * Subclasses can override this with their specific logic, or they may |
| 191 | * provide an 'active_callback' argument to the constructor. |