is_wpmu_sitewide_plugin( $file )

This function has been deprecated. Use is_network_only_plugin() instead.

Deprecated functionality for determining if the current plugin is network-only.

Description

See also

Source

File: wp-admin/includes/ms-deprecated.php 

function is_wpmu_sitewide_plugin( $file ) {
	_deprecated_function( __FUNCTION__, '3.0.0', 'is_network_only_plugin()' );
	return is_network_only_plugin( $file );
}

Uses

Uses Description
wp-admin/includes/plugin.php: is_network_only_plugin()

Checks for “Network: true” in the plugin header to see if this should be activated only as a network wide plugin. The plugin would also work when Multisite is not enabled.
wp-includes/functions.php: _deprecated_function()

Mark a function as deprecated and inform when it has been used.

Changelog

Version Description
3.0.0 Introduced.

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