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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 |
|---|---|
| 488 | if ( $this->query_vars['number'] && ! $this->query_vars['no_found_rows'] ) { |
| 489 | /** |
| 490 | * Filters the query used to retrieve found network count. |
| 491 | * |
| 492 | * @since 4.6.0 |
| 493 | * |
| 494 | * @param string $found_networks_query SQL query. Default 'SELECT FOUND_ROWS()'. |
| 495 | * @param WP_Network_Query $network_query The `WP_Network_Query` instance. |
| 496 | */ |
| 497 | $found_networks_query = apply_filters( 'found_networks_query', 'SELECT FOUND_ROWS()', $this ); |
| 498 | |
| 499 | $this->found_networks = (int) $wpdb->get_var( $found_networks_query ); |
| 500 | } |
| 501 | } |
| 502 | |
| 503 | /** |
| 504 | * Used internally to generate an SQL string for searching across multiple columns. |
| 505 | * |
| 506 | * @since 4.6.0 |