Http empty response with PHP - php

Question

I have a big trouble here in my hands. Randomly my server starts returning no buffer from my PHP files. I mean, I access somefile.php, and then I do some things in the system, when I try to access somefile.php again I suddenly got a ERR_EMPTY RESPONSE (in the browser).
I have already tried in all browsers. Same thing. When I ask to anyone else access the same file in a different machine, it goes ok, but in my machine, I still seeing the error. So I have decided to do a cURL request in the page and see what's going on, the result is below.
With the following code:
<?php
$ch = curl_init("http://192.168.1.15/curiaonline/projetobase/paroquialogada.php");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_VERBOSE, true);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_POST, true);
?>
I got:
HTTP/1.1 200 OK
Date: Tue, 16 Jun 2015 20:41:59 GMT
Server: Apache/2.4.9 (Win64) PHP/5.5.12
X-Powered-By: PHP/5.5.12
Content-Length: 7
Connection: close
Content-Type: text/html
hy test"
* Hostname was NOT found in DNS cache
* Trying 192.168.1.15...
* Connected to 192.168.1.15 (192.168.1.15) port 80 (#0)
> POST /curiaonline/projetobase/paroquialogada.php HTTP/1.1
Host: 192.168.1.15
Accept: */*
Content-Type: application/x-www-form-urlencoded
Expect: 100-continue
< HTTP/1.1 200 OK
< Date: Tue, 16 Jun 2015 20:41:59 GMT
< Server: Apache/2.4.9 (Win64) PHP/5.5.12
< X-Powered-By: PHP/5.5.12
< Content-Length: 7
< Connection: close
< Content-Type: text/html
<
* Closing connection 0
and then I change the CURLOPT_POST to FALSE I got:
* Hostname was NOT found in DNS cache
* Trying 192.168.1.15...
* Connected to 192.168.1.15 (192.168.1.15) port 80 (#0)
> GET /curiaonline/projetobase/paroquialogada.php HTTP/1.1
Host: 192.168.1.15
Accept: */*
* Empty reply from server
* Connection #0 to host 192.168.1.15 left intact
The paroquialogada.php file only contains "hy test".
I have already tried:
To disable my firewall
To disable server firewall
To search for errors in PHP error log
To search for errors in Apache error log
To clean my dns cache
To renew my windows connection

Answer 1

I have found the problem. It was the security software for internet banking that I have to use to access my account, since I'm a Banco do Brasil's customer. This software provided by GAS Tecnologia see chrome request as viruses, and block the responses from the server in Windows. Anyone who have a likely problem, and use Internet Banking, just disable this software.

Answer 2

and then I change the CURLOPT_POST to FALSE I got:
If page content requires POST to handle request. Every request must with POST request.
for example assume a page which has like below
if( isset($_POST["blabla"]) ){
//then do something
}
if part works only with POST, so consider this issue.
Don't refresh your page on browser. Submit necessary values with POST.