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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 |
|---|---|
| 99 | wp_dashboard_trigger_widget_control( $_POST['widget_id'] ); |
| 100 | ob_end_clean(); |
| 101 | wp_redirect( remove_query_arg( 'edit' ) ); |
| 102 | exit; |
| 103 | } |
| 104 | |
| 105 | if ( $update ) |
| 106 | update_option( 'dashboard_widget_options', $widget_options ); |
| 107 | |
| 108 | do_action('do_meta_boxes', 'dashboard', 'normal', ''); |
| 109 | do_action('do_meta_boxes', 'dashboard', 'side', ''); |
| 110 | } |
| 111 | |
| 112 | function wp_add_dashboard_widget( $widget_id, $widget_name, $callback, $control_callback = null ) { |
| 113 | global $wp_dashboard_control_callbacks; |
| 114 | if ( $control_callback && current_user_can( 'edit_dashboard' ) && is_callable( $control_callback ) ) { |
| 115 | $wp_dashboard_control_callbacks[$widget_id] = $control_callback; |
| 116 | if ( isset( $_GET['edit'] ) && $widget_id == $_GET['edit'] ) { |
| 117 | list($url) = explode( '#', add_query_arg( 'edit', false ), 2 ); |
| 118 | $widget_name .= ' <span class="postbox-title-action"><a href="' . clean_url( $url ) . '">' . __( 'Cancel' ) . '</a></span>'; |