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is_site_meta_supported()

is_site_meta_supported(): bool

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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

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; }

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UsesDescription
update_network_option()wp-includes/option.php

Updates the value of a network option that was already added.

get_network_option()wp-includes/option.php

Retrieves a network’s option value based on the option name.

get_main_network_id()wp-includes/functions.php

Gets the main network ID.

is_multisite()wp-includes/load.php

Determines whether Multisite is enabled.

wpdb::get_var()wp-includes/class-wpdb.php

Retrieves one value from the database.

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Used byDescription
wp_check_site_meta_support_prefilter()wp-includes/ms-site.php

Aborts calls to site meta if it is not supported.

wp_delete_site()wp-includes/ms-site.php

Deletes a site from the database.

populate_site_meta()wp-admin/includes/schema.php

Creates WordPress site meta and sets the default values.

upgrade_network()wp-admin/includes/upgrade.php

Executes network-level upgrade routines.

Changelog

VersionDescription
5.1.0Introduced.

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