Problem with PHP + Apache XAMPP redirect

The problem is as follows:

Form.php file:

<?php session_start(); ?>

<form action="x.php" method="post">

  <?php  
      $_SESSION["urlName"] = $_SERVER["HTTP_HOST"] . $_SERVER["PHP_SELF"];

      echo $_SESSION["urlName"];
  ?>

    <input type="email">
    <button type="submit"></button>
</form>

x.php file:

<?php
    require("redirect.php");

    $urlName = $_SESSION["urlName"];

    if(isset($_SESSION["urlName"]))
        echo $urlName;
    else
        echo "URL NÃO encontrada";

pageRedirect($urlName);

File redirect.php:

<?php
    function pageRedirect($urlName){
        header("Location: " . $urlName);
        die();
    }

Value received on $urlName :

  

"192.168.x.xx: xxx / project / site-x / index.php"

Type: String

ERROR MESSAGE:

  

This page is not working   192.168.x.xx has sent an invalid response. ERR_INVALID_REDIRECT

*

OBS: Not a duplicate of Undefined variable: _SESSION , are different issues.

Hosts file:

# copyright (c) 1993-2009 microsoft corp.
#
# this is a sample hosts file used by microsoft tcp/ip for windows.
#
# this file contains the mappings of ip addresses to host names. each
# entry should be kept on an individual line. the ip address should
# be placed in the first column followed by the corresponding host name.
# the ip address and the host name should be separated by at least one
# space.
#
# additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# for example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host

# localhost name resolution is handled within dns itself.
#   127.0.0.1       localhost
#   ::1             localhost