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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 794 | * @type string $widget_name Name of the widget. |
| 795 | * } |
| 796 | * @type array $widget_args { |
| 797 | * An array of multi-widget arguments. |
| 798 | * |
| 799 | * @type int $number Number increment used for multiples of the same widget. |
| 800 | * } |
| 801 | * } |
| 802 | */ |
| 803 | $params = apply_filters( 'dynamic_sidebar_params', $params ); |
| 804 | |
| 805 | $callback = $wp_registered_widgets[ $id ]['callback']; |
| 806 | |
| 807 | /** |
| 808 | * Fires before a widget's display callback is called. |
| 809 | * |
| 810 | * Note: The action fires on both the front end and back end, including |
| 811 | * for widgets in the Inactive Widgets sidebar on the Widgets screen. |
| 812 | * |
| Line | Code |
| 2003 | $classname_ .= '_' . $cn; |
| 2004 | } elseif ( is_object( $cn ) ) { |
| 2005 | $classname_ .= '_' . get_class( $cn ); |
| 2006 | } |
| 2007 | } |
| 2008 | $classname_ = ltrim( $classname_, '_' ); |
| 2009 | $params[0]['before_widget'] = sprintf( $params[0]['before_widget'], $widget_id, $classname_ ); |
| 2010 | |
| 2011 | /** This filter is documented in wp-includes/widgets.php */ |
| 2012 | $params = apply_filters( 'dynamic_sidebar_params', $params ); |
| 2013 | |
| 2014 | $callback = $wp_registered_widgets[ $widget_id ]['callback']; |
| 2015 | |
| 2016 | ob_start(); |
| 2017 | |
| 2018 | /** This filter is documented in wp-includes/widgets.php */ |
| 2019 | do_action( 'dynamic_sidebar', $wp_registered_widgets[ $widget_id ] ); |
| 2020 | |
| 2021 | if ( is_callable( $callback ) ) { |