Using ajax how can I pass variables to two different php scripts - php

Question

I have two forms that sends data using ajax. Both forms have their own scripts and I thought that I would be able to access the same $_POST[] variables on the separate scripts, but this is not working. I tried using session_start() and include_once and for some reason I can't figure out why the variables are not passing from script to script. I've been at it for three days researching for a solution so if you know what I'm doing wrong or have an alternative please let me know thanks.
javascript.
$('.test-input').load("test.php", {
'sendTo':sendTo,
'carrier':carrier,
'testSubmit':testSubmit
})
$('#error-display').load("textsms.php", {
'date':scheduleDate,
'firstname':firstName,
'number':number,
'message':message,
'time':time,
'service':service,
'submit':submit
})
test.php
if (isset($_POST['testSubmit'])) {
$sendTo = $_POST['sendTo'];
$carrier = $_POST['carrier'];
$sendToInvalid = false;
$testEmpty = false;
$sendTo = "";
if (!preg_match('/^\(?\b\d{3}[-.)\s]?\s?\d{3}[-.)\s]?\d{4}\b$/', $sendTo) and $sendTo !== '') {
$sendToInvalid = true;
} elseif (empty($sendTo) || empty($carrier)) {
$testEmpty = true;
} else {
$sendTo = preg_replace('/[-.()\s]/','',$sendTo).$carrier;
$_SESSION['sendTo'] = $sendTo;
}
}
Trying to get $sendTo to pass to textsms.php down below.
else {
include 'test.php';
$sendTo = $_SESSION['sendTo'];
$number = preg_replace('/[-.()\s]/','',$number);
$number = "(".substr($number,0,3).") ".substr($number,3,3)."-".substr($number,6,4);
if ($sendTo !== "contactme#aboutryansam.com") {
$header = $name."\r\n#: ".$number;
$sendMsg = $userMsg."\r\nOn: ".$date.$time."\r\nService: ".$service;
//mail($sendTo, "You win!", $sendMsg, $header);
echo $sendTo;
echo "it worked";
}

Answer 1

Of course, on the page you initialize the ajax, include the "header.php" file that has inside session_start(). include_once('header.php') in the test.php as well. It should do the trick.
It's not a good practice nowadays, I better suggest you to use cookies and access them with $_COOKIE. Even better, use a library that takes care of cookies like this one. JQuery also has very good cookie management.