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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 |
|---|---|
| 198 | } |
| 199 | |
| 200 | /** |
| 201 | * Fires before a user is deleted from the network. |
| 202 | * |
| 203 | * @since MU |
| 204 | * |
| 205 | * @param int $id ID of the user about to be deleted from the network. |
| 206 | */ |
| 207 | do_action( 'wpmu_delete_user', $id ); |
| 208 | |
| 209 | $blogs = get_blogs_of_user( $id ); |
| 210 | |
| 211 | if ( ! empty( $blogs ) ) { |
| 212 | foreach ( $blogs as $blog ) { |
| 213 | switch_to_blog( $blog->userblog_id ); |
| 214 | remove_user_from_blog( $id, $blog->userblog_id ); |
| 215 | |
| 216 | $post_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_author = %d", $id ) ); |