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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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172 |
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173 | /** |
174 | * Filter response of WP_Customize_Panel::active(). |
175 | * |
176 | * @since 4.1.0 |
177 | * |
178 | * @param bool $active Whether the Customizer panel is active. |
179 | * @param WP_Customize_Panel $panel {@see WP_Customize_Panel} instance. |
180 | */ |
181 | $active = apply_filters( 'customize_panel_active', $active, $panel ); |
182 |
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183 | return $active; |
184 | } |
185 |
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186 | /** |
187 | * Default callback used when invoking {@see WP_Customize_Panel::active()}. |
188 | * |
189 | * Subclasses can override this with their specific logic, or they may |
190 | * provide an 'active_callback' argument to the constructor. |