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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 |
|---|---|
| 327 | * |
| 328 | * Returning false will effectively short-circuit display of the widget. |
| 329 | * |
| 330 | * @since 2.8.0 |
| 331 | * |
| 332 | * @param array $instance The current widget instance's settings. |
| 333 | * @param WP_Widget $this The current widget instance. |
| 334 | * @param array $args An array of default widget arguments. |
| 335 | */ |
| 336 | $instance = apply_filters( 'widget_display_callback', $instance, $this, $args ); |
| 337 | |
| 338 | if ( false === $instance ) { |
| 339 | return; |
| 340 | } |
| 341 | |
| 342 | $was_cache_addition_suspended = wp_suspend_cache_addition(); |
| 343 | if ( $this->is_preview() && ! $was_cache_addition_suspended ) { |
| 344 | wp_suspend_cache_addition( true ); |
| 345 | } |