php lang _GET lang public function setLanguage lang if lang ru or lang

	<?php
    
    
    $lang = $_GET['lang'];
    
    public function setLanguage($lang) {
		if($lang !== 'ru' or $lang !== 'eng'){
			header('Location:/');
			exit;
		}
		if(empty($_COOKIE['lang']) || $_COOKIE['lang'] !== $lang){
			if($_COOKIE['lang']) setcookie('lang', '', '1');
			setcookie('lang', $lang, time()+3600);
			header('Location:/');
			exit;
		}
	}	
    
    
    
    ?>