How to call a PHP script from a PHP script on another server
<p>I have access to two distinct servers. I would like one's PHP script to call a URL on the other's server (and pass a secret variable). However, I want to make sure nobody else can spoof this call.</p>

<p>What is the best way to do this, short of SSL? I was thinking about hashing but anyone can read the POST request's hash and spoof it.</p>

<p>Thanks!</p>
