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is_site_admin( string $user_login = '' )

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

Determine if user is a site admin.

Description

Plugins should use is_multisite() instead of checking if this function exists to determine if multisite is enabled.

This function must reside in a file included only if is_multisite() due to legacy function_exists() checks to determine if multisite is enabled.

See also

Parameters

$user_login

(string) (Optional) Username for the user to check.

Default value: ''

Source

File: wp-includes/ms-deprecated.php 

function is_site_admin( $user_login = '' ) {
	_deprecated_function( __FUNCTION__, '3.0.0', 'is_super_admin()' );

	if ( empty( $user_login ) ) {
		$user_id = get_current_user_id();
		if ( !$user_id )
			return false;
	} else {
		$user = get_user_by( 'login', $user_login );
		if ( ! $user->exists() )
			return false;
		$user_id = $user->ID;
	}

	return is_super_admin( $user_id );
}

Uses

Uses Description
wp-includes/capabilities.php: is_super_admin()

Determine if user is a site admin.
wp-includes/pluggable.php: get_user_by()

Retrieve user info by a given field
wp-includes/functions.php: _deprecated_function()

Mark a function as deprecated and inform when it has been used.
wp-includes/user.php: get_current_user_id()

Get the current user’s ID

Changelog

Version Description
3.0.0 Use is_super_admin()
MU (3.0.0) Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/is_site_admin