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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 |
|---|---|
| 170 | break; |
| 171 | default: |
| 172 | if ( ! isset( $_REQUEST['users'] ) ) { |
| 173 | break; |
| 174 | } |
| 175 | check_admin_referer( 'bulk-users' ); |
| 176 | $userids = $_REQUEST['users']; |
| 177 | |
| 178 | /** This action is documented in wp-admin/network/site-themes.php */ |
| 179 | $referer = apply_filters( 'handle_network_bulk_actions-' . get_current_screen()->id, $referer, $action, $userids, $id ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores |
| 180 | |
| 181 | $update = $action; |
| 182 | break; |
| 183 | } |
| 184 | |
| 185 | wp_safe_redirect( add_query_arg( 'update', $update, $referer ) ); |
| 186 | exit; |
| 187 | } |
| 188 | |