is_site_meta_supported()

Determines whether site meta is enabled.

Description

This function checks whether the ‘blogmeta’ database table exists. The result is saved as a setting for the main network, making it essentially a global setting. Subsequent requests will refer to this setting instead of running the query.

Return

(bool) True if site meta is supported, false otherwise.

Source

File: wp-includes/functions.php 

function is_site_meta_supported() {
	global $wpdb;

	if ( ! is_multisite() ) {
		return false;
	}

	$network_id = get_main_network_id();

	$supported = get_network_option( $network_id, 'site_meta_supported', false );
	if ( false === $supported ) {
		$supported = $wpdb->get_var( "SHOW TABLES LIKE '{$wpdb->blogmeta}'" ) ? 1 : 0;

		update_network_option( $network_id, 'site_meta_supported', $supported );
	}

	return (bool) $supported;
}

Changelog

Version Description
5.1.0 Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/is_site_meta_supported