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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 |
|---|---|
| 221 | do_action_deprecated( 'delete_blog', array( $old_site->id, true ), '5.1.0' ); |
| 222 | |
| 223 | /** |
| 224 | * Fires when a site's uninitialization routine should be executed. |
| 225 | * |
| 226 | * @since 5.1.0 |
| 227 | * |
| 228 | * @param WP_Site $old_site Deleted site object. |
| 229 | */ |
| 230 | do_action( 'wp_uninitialize_site', $old_site ); |
| 231 | |
| 232 | if ( is_site_meta_supported() ) { |
| 233 | $blog_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->blogmeta WHERE blog_id = %d ", $old_site->id ) ); |
| 234 | foreach ( $blog_meta_ids as $mid ) { |
| 235 | delete_metadata_by_mid( 'blog', $mid ); |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | if ( false === $wpdb->delete( $wpdb->blogs, array( 'blog_id' => $old_site->id ) ) ) { |