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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 |
|---|---|
| 512 | if ( $this->query_vars['number'] && ! $this->query_vars['no_found_rows'] ) { |
| 513 | /** |
| 514 | * Filters the query used to retrieve found network count. |
| 515 | * |
| 516 | * @since 4.6.0 |
| 517 | * |
| 518 | * @param string $found_networks_query SQL query. Default 'SELECT FOUND_ROWS()'. |
| 519 | * @param WP_Network_Query $network_query The `WP_Network_Query` instance. |
| 520 | */ |
| 521 | $found_networks_query = apply_filters( 'found_networks_query', 'SELECT FOUND_ROWS()', $this ); |
| 522 | |
| 523 | $this->found_networks = (int) $wpdb->get_var( $found_networks_query ); |
| 524 | } |
| 525 | } |
| 526 | |
| 527 | /** |
| 528 | * Used internally to generate an SQL string for searching across multiple columns. |
| 529 | * |
| 530 | * @since 4.6.0 |