What is the purpose of the crc function in php
<p>I have a variable</p>

<pre><code>   $offset = abs(crc32($_SERVER["SERVER_NAME"]) % 500);
</code></pre>

<p>and I do not understand it's place in the script. All it seems to do is generate a random number based on the server name (e.g. www.example.com). Is that a correct interpretation of this variable? </p>

<p>Thanks</p>
