PHP setcookie

setcookie.php

<?php
if( isset($_COOKIE['cw_section']) ){// cookie is set
	$redirect_section = $_COOKIE['cw_section'];
	if($redirect_section == 'doctor'){
		header('Location: http://www.example.com/doctor/');
	}
	else{
		header('Location: http://www.example.com/patient/');
	}
}
else{// cookie is not set
	if(isset($_POST['submit']){// if form submitted
		$value = $_POST['section'];// get the value of the section field
		setcookie("cw_section", $value, time()+3600, "/", "example.com");// set the cookie with the field
		header('Location: http://www.example.com/patient/');// redirect to that section
	}
}
?>