WP_Sitemaps_Index::get_sitemap_list(): array[]

55	public function get_sitemap_list() {56		$sitemaps = array();57 58		$providers = $this->registry->get_providers();59		/* @var WP_Sitemaps_Provider $provider */60		foreach ( $providers as $name => $provider ) {61			$sitemap_entries = $provider->get_sitemap_entries();62 63			// Prevent issues with array_push and empty arrays on PHP < 7.3.64			if ( ! $sitemap_entries ) {65				continue;66			}67 68			// Using array_push is more efficient than array_merge in a loop.69			array_push( $sitemaps, ...$sitemap_entries );70			if ( count( $sitemaps ) >= $this->max_sitemaps ) {71				break;72			}73		}74 75		return array_slice( $sitemaps, 0, $this->max_sitemaps, true );76	}