Here is an example of how to track Mixpanel Revenue Data using PHP and HTTP Post methods.

Mixpanel-Revenue-PHP.php

<?php
       
$params = array(
  '$append' => array(
		'$transactions' => array(
			'$time' => '2013-01-03T00:58:05',
			'$amount' => 125.34
		),
	),
	'$token' => 'YOUR_MIX_PANEL_TOKEN',
	'$ip' => $_SERVER['REMOTE_ADDR'],
	'$distinct_id' => "YOUR_UNIQUE_IDENTIFIER"
);

$url = 'http://api.mixpanel.com/engage/?data=' . base64_encode(json_encode($params));
exec("curl '" . $url . "' >/dev/null 2>&1 &");        
     
?>