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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 |
|---|---|
| 1279 | |
| 1280 | /** |
| 1281 | * Filters meta for a network on creation. |
| 1282 | * |
| 1283 | * @since 3.7.0 |
| 1284 | * |
| 1285 | * @param array $sitemeta Associative array of network meta keys and values to be inserted. |
| 1286 | * @param int $network_id ID of network to populate. |
| 1287 | */ |
| 1288 | $sitemeta = apply_filters( 'populate_network_meta', $sitemeta, $network_id ); |
| 1289 | |
| 1290 | $insert = ''; |
| 1291 | foreach ( $sitemeta as $meta_key => $meta_value ) { |
| 1292 | if ( is_array( $meta_value ) ) { |
| 1293 | $meta_value = serialize( $meta_value ); |
| 1294 | } |
| 1295 | if ( ! empty( $insert ) ) { |
| 1296 | $insert .= ', '; |
| 1297 | } |