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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 |
|---|---|
| 1325 | |
| 1326 | /** |
| 1327 | * Filters meta for a site on creation. |
| 1328 | * |
| 1329 | * @since 5.2.0 |
| 1330 | * |
| 1331 | * @param array $meta Associative array of site meta keys and values to be inserted. |
| 1332 | * @param int $site_id ID of site to populate. |
| 1333 | */ |
| 1334 | $site_meta = apply_filters( 'populate_site_meta', $meta, $site_id ); |
| 1335 | |
| 1336 | $insert = ''; |
| 1337 | foreach ( $site_meta as $meta_key => $meta_value ) { |
| 1338 | if ( is_array( $meta_value ) ) { |
| 1339 | $meta_value = serialize( $meta_value ); |
| 1340 | } |
| 1341 | if ( ! empty( $insert ) ) { |
| 1342 | $insert .= ', '; |
| 1343 | } |