PHP script doesnt redirect to "header" page - php

Question

Here is the issue. I am trying to troubleshoot an issue in my PHP script that prevents it from emailing the info, our client has inputted.
<?php
session_start();
if($_SERVER["REQUEST_METHOD"] == "POST")
{
$recaptcha=$_POST['g-recaptcha-response'];
if(!empty($recaptcha))
{
include("getCurlData.php");
$google_url="https://www.google.com/recaptcha/api/siteverify";
$secret='6LegpgYTAAAAABK9Nd45_DfAPu7_gwHro9pj902B';
$ip=$_SERVER['REMOTE_ADDR'];
$url=$google_url."?secret=".$secret."&response=".$recaptcha."&remoteip=".$ip;
$res=getCurlData($url);
$res= json_decode($res, true);
//reCaptcha success check
if($res['success'])
{
$headers = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=utf-8' . "\r\n";
if(isset($_POST['submit'])) {
$to = "denislav#svishtov.net";
$subject = "New opinion post";
// data the visitor provided
$name_field = filter_var($_POST['name'], FILTER_SANITIZE_STRING);
$phone_field = filter_var($_POST['number']);
$address_field = filter_var($_POST['address'], FILTER_SANITIZE_STRING);
$comment = filter_var($_POST['comment'], FILTER_SANITIZE_STRING);
//constructing the message
$body = "
From: $name_field <br/>
Email Address: $address_field <br/>
Phone number: $phone_field <br/>
Message:<br/> $comment ";
// ...and away we go!
mail($to, $subject, $body, $headers);
// redirect to confirmation
header("Location: confirmation2.html");
}
else {
// handle the error somehow
echo "Error accessing the file";
}
}
else
{
echo "Въвели сте грешен код за потвърждаване (reCAPTCHA)! Натиснете "назад" и опитайте отново";
}
}
else
{
echo "Не сте въвели код за потвърждаване (reCAPTCHA)! Натиснете "назад" и опитайте отново";
}
}
?>
worse thing is , it used to work , then I opened it, edited some stuff and now it doesnt work, tried the back-up copy and it still doesnt work !?
Working in CMS MadeSimple. the URLs are correct , the confirmation2.html is a file, not a page made in CMS and it is in the same folder as the php script and if I try to access it directly (not via the contact from) its there, I have tried ' ' and " " quotes, still no change.
Probably a simple mistake, I did try looking for other solutions in here (stackoverflow.com) but nothing to fix my current issue. I know that I shouldnt have any output before the header but... well I dont have any output so, I'm baffled.
Appreciation in advance to those who want to help!

Answer 1

UPDATE:
Seems like the reCAPTCHA was shitting me, and after I removed it - WORKS.
Gonna leave it defenseless for now. Thanks to all who wanted to help.