dechex(4000) - Why is it not signed?
<p>Why does PHP's <code>dechex(4000)</code> not return a signed hexadecimal value?</p>

<p>It returns:</p>

<pre><code>fa0
</code></pre>

<p>As opposed to:</p>

<pre><code>0xfa0
</code></pre>

<p>And is <code>signed</code> the correct term to use in describing this problem?  Or is there a better term to describe the <code>0x</code> portion?  Is that called a prefix?</p>
