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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 |
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306 |
|
307 | /** |
308 | * Filters the site query results. |
309 | * |
310 | * @since 4.6.0 |
311 | * |
312 | * @param array $results An array of sites. |
313 | * @param WP_Site_Query &$this Current instance of WP_Site_Query, passed by reference. |
314 | */ |
315 | $_sites = apply_filters_ref_array( 'the_sites', array( $_sites, &$this ) ); |
316 |
|
317 | // Convert to WP_Site instances. |
318 | $this->sites = array_map( 'get_site', $_sites ); |
319 |
|
320 | return $this->sites; |
321 | } |
322 |
|
323 | /** |
324 | * Used internally to get a list of site IDs matching the query vars. |