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filter is not described

found_networks_query filter-hook . WP 4.6.0

Filters the query used to retrieve found network count.

Usage

add_filter( 'found_networks_query', 'filter_function_name_7141', 10, 2 );
function filter_function_name_7141( $found_networks_query, $network_query ){
	// filter...

	return $found_networks_query;
}
$found_networks_query(string)
SQL query.
Default: 'SELECT FOUND_ROWS()'
$network_query(WP_Network_Query)
The WP_Network_Query instance.

Where the hook is called

WP_Network_Query::set_found_networks()
wp-includes/class-wp-network-query.php 472
$found_networks_query = apply_filters( 'found_networks_query', 'SELECT FOUND_ROWS()', $this );

Where the hook is used (in WP core)

Does not used.