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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 |
|---|---|
| 1260 | |
| 1261 | /** |
| 1262 | * Filters meta for a network on creation. |
| 1263 | * |
| 1264 | * @since 3.7.0 |
| 1265 | * |
| 1266 | * @param array $sitemeta Associative array of network meta keys and values to be inserted. |
| 1267 | * @param int $network_id ID of network to populate. |
| 1268 | */ |
| 1269 | $sitemeta = apply_filters( 'populate_network_meta', $sitemeta, $network_id ); |
| 1270 | |
| 1271 | $insert = ''; |
| 1272 | foreach ( $sitemeta as $meta_key => $meta_value ) { |
| 1273 | if ( is_array( $meta_value ) ) { |
| 1274 | $meta_value = serialize( $meta_value ); |
| 1275 | } |
| 1276 | if ( ! empty( $insert ) ) { |
| 1277 | $insert .= ', '; |
| 1278 | } |