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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 |
|---|---|
| 219 | } |
| 220 | |
| 221 | /** |
| 222 | * Fires before a user is deleted from the network. |
| 223 | * |
| 224 | * @since MU (3.0.0) |
| 225 | * |
| 226 | * @param int $id ID of the user about to be deleted from the network. |
| 227 | */ |
| 228 | do_action( 'wpmu_delete_user', $id ); |
| 229 | |
| 230 | $blogs = get_blogs_of_user( $id ); |
| 231 | |
| 232 | if ( ! empty( $blogs ) ) { |
| 233 | foreach ( $blogs as $blog ) { |
| 234 | switch_to_blog( $blog->userblog_id ); |
| 235 | remove_user_from_blog( $id, $blog->userblog_id ); |
| 236 | |
| 237 | $post_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_author = %d", $id ) ); |