Set cookie not working?

PHP
1

Hello guys,

Why these setting a cookie below works only under my computer.
When I use different computer it doesn’t work.


	//Set or Extend Cookie logoutid.
	function lidgen() {
		//If cookie is not set
			//set cookie logoutid
		if(!isset($_COOKIE['logoutid'])) {
			$expire = 60 * 60 * 24 * 180 + time(); //Expire in 6 months.
			//$expire_unset = time() - 86400;
			
			//$logoutid = Modules::run('tasks/cidgen'); //Get unique logoutid.
			$logoutid = $this->cidgen();
			
			//Delete existing duplicate logoutid in completion table.
			$this->completion_mdl->delete_logoutid($logoutid);
			
			setcookie("logoutid", $logoutid, $expire);
			return $logoutid;
		}
	
		//If cookie is set
			//Extend cookie expiration
		if(isset($_COOKIE['logoutid'])) {
			$expire = 60 * 60 * 24 * 180 + time(); //Expire in 6 months.
			//$expire_unset = time() - 86400;
			
			$logoutid = $_COOKIE['logoutid'];
			setcookie("logoutid", $logoutid, $expire);
			return $logoutid;
		}
	}

 	//Generate random unique cookie logout_id.
	function cidgen() {
		//generate unique logout id.
		//Find match from completion table.
		//If match found re-generate the logout id again.
		//If match not found store to cookie.
		$logout_id_random =  md5(uniqid(rand(), true));
		//echo $logout_id_random;
		
		//Check if $logout_id_random already exist in the database.
		$logout_id_found = $this->completion_mdl->match_logout_id($logout_id_random);
		
		if($logout_id_found) {
			$this->cidgen(); //Regenerate logout id again, if found duplicate in the database.
		} else {
			//store to cookie
			$logout_id_random;
		}
	}

Thanks in advance, whoever will explain to me the reason.

2 
//store to cookie
$logout_id_random;

You’re missing a return statement.

//store to cookie
return $logout_id_random;

My guess is that it works on your computer because the cookie is already set from a previous version of the code. Therefore it bypasses using the cidgen method entirely.