OAP Days Between

<?php
/*
Days Between Date Events

Get the variables from the URL
	$contact_id (oap contact id)
	$date_a (first event date)
	$date_b (last event date)

date1 = YYYY-MM-DD

Calculate the number of calendar days between events.

Setup your PING URL Like this:
http://yourdomain.com/daysbetween.php?contact_id=[contact_id]&date1=[First Event Date]&date2=[Last Event Date]

*/

//GET variables from URL
$contact_id = $_GET["contact_id"];
$date_a = $_GET["date1"];
$date_b = $_GET["date2"];

//String to Time
$date_a = strtotime($date_a);
$date_b = strtotime($date_b);

//Do math - difference in time between dates in days
$interval = $date_b - $date_a; //Interval in seconds
$interval = ($interval / 86400); //Interval in days

//Pass the interval back to OAP.  Change the group and field names as appropriate.
$data = <<<STRING
//You must pass the contact ID as an argument to indicate which contact is being updated
<contact id="$contact_id">
<Group_Tag name="Days Between">
<field name="Added Video 1 Watched">$interval</field>
</Group_Tag>
</contact>
STRING;

$data = urlencode(urlencode($data));

// Replace the strings with your API credentials located in Admin > OfficeAutoPilot API Instructions and Key Manager
$appid = "XXXX";
$key = "XXXX";

$reqType= "update";
$postargs = "appid=".$appid."&key=".$key."&return_id=1&reqType=".$reqType. "&data=" . $data;
$request = "https://api.moon-ray.com/cdata.php";

$session = curl_init($request);
curl_setopt ($session, CURLOPT_POST, true);
curl_setopt ($session, CURLOPT_POSTFIELDS, $postargs);
curl_setopt($session, CURLOPT_HEADER, false);
curl_setopt($session, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($session);
curl_close($session);
header("Content-Type: text/xml");
echo $response;




?>