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			is_site_admin is deprecated since version 3.0.0!
Alternative: is_super_admin()
Alternative: is_super_admin()
is_site_admin › WordPress Function
Since
Deprecated3.0.0
› is_site_admin ( $user_login = '' )
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| Defined at: | 
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Determine if user is a site admin.
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.Source
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 );
}