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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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186 |
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187 | /** |
188 | * Filters response of WP_Customize_Panel::active(). |
189 | * |
190 | * @since 4.1.0 |
191 | * |
192 | * @param bool $active Whether the Customizer panel is active. |
193 | * @param WP_Customize_Panel $panel WP_Customize_Panel instance. |
194 | */ |
195 | $active = apply_filters( 'customize_panel_active', $active, $panel ); |
196 |
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197 | return $active; |
198 | } |
199 |
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200 | /** |
201 | * Default callback used when invoking WP_Customize_Panel::active(). |
202 | * |
203 | * Subclasses can override this with their specific logic, or they may |
204 | * provide an 'active_callback' argument to the constructor. |