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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 |
|---|---|
| 392 | |
| 393 | /** |
| 394 | * Filters the site query results. |
| 395 | * |
| 396 | * @since 4.6.0 |
| 397 | * |
| 398 | * @param WP_Site[] $_sites An array of WP_Site objects. |
| 399 | * @param WP_Site_Query $query Current instance of WP_Site_Query (passed by reference). |
| 400 | */ |
| 401 | $_sites = apply_filters_ref_array( 'the_sites', array( $_sites, &$this ) ); |
| 402 | |
| 403 | // Convert to WP_Site instances. |
| 404 | $this->sites = array_map( 'get_site', $_sites ); |
| 405 | |
| 406 | return $this->sites; |
| 407 | } |
| 408 | |
| 409 | /** |
| 410 | * Used internally to get a list of site IDs matching the query vars. |