Parameter $now in php function strtotime()
<p>I'm trying to understand what $now parameter is doing in php function </p>

<blockquote>
  <p>strtotime(string $time [, int $now = time() ])</p>
</blockquote>

<p>Everybody seems to simply ignore the $now parameter and the documentation for it is not very clear.</p>

<p>How does that parameter really affect the returned value?</p>
