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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 |
|---|---|
| 908 | if ( is_callable($output_callback) && ( !isset($wp_registered_widgets[$id]) || did_action( 'widgets_init' ) ) ) { |
| 909 | |
| 910 | /** |
| 911 | * Fires once for each registered widget. |
| 912 | * |
| 913 | * @since 3.0.0 |
| 914 | * |
| 915 | * @param array $widget An array of default widget arguments. |
| 916 | */ |
| 917 | do_action( 'wp_register_sidebar_widget', $widget ); |
| 918 | $wp_registered_widgets[$id] = $widget; |
| 919 | } |
| 920 | } |
| 921 | |
| 922 | /** |
| 923 | * Retrieve description for widget. |
| 924 | * |
| 925 | * When registering widgets, the options can also include 'description' that |
| 926 | * describes the widget for display on the widget administration panel or |