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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 |
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599 | if ( $this->query_vars['number'] && ! $this->query_vars['no_found_rows'] ) { |
600 | /** |
601 | * Filters the query used to retrieve found site count. |
602 | * |
603 | * @since 4.6.0 |
604 | * |
605 | * @param string $found_sites_query SQL query. Default 'SELECT FOUND_ROWS()'. |
606 | * @param WP_Site_Query $site_query The `WP_Site_Query` instance. |
607 | */ |
608 | $found_sites_query = apply_filters( 'found_sites_query', 'SELECT FOUND_ROWS()', $this ); |
609 |
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610 | $this->found_sites = (int) $wpdb->get_var( $found_sites_query ); |
611 | } |
612 | } |
613 |
|
614 | /** |
615 | * Used internally to generate an SQL string for searching across multiple columns. |
616 | * |
617 | * @since 4.6.0 |