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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 |
|---|---|
| 159 | /** |
| 160 | * Fires before a user is deleted from the network. |
| 161 | * |
| 162 | * @since MU (3.0.0) |
| 163 | * @since 5.5.0 Added the `$user` parameter. |
| 164 | * |
| 165 | * @param int $id ID of the user about to be deleted from the network. |
| 166 | * @param WP_User $user WP_User object of the user about to be deleted from the network. |
| 167 | */ |
| 168 | do_action( 'wpmu_delete_user', $id, $user ); |
| 169 | |
| 170 | $blogs = get_blogs_of_user( $id ); |
| 171 | |
| 172 | if ( ! empty( $blogs ) ) { |
| 173 | foreach ( $blogs as $blog ) { |
| 174 | switch_to_blog( $blog->userblog_id ); |
| 175 | remove_user_from_blog( $id, $blog->userblog_id ); |
| 176 | |
| 177 | $post_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_author = %d", $id ) ); |