PHP preg_quote() and less-than sign
<pre><code>echo preg_quote("aaa&lt;bbb");
</code></pre>

<p><br>
should write:</p>

<pre><code>aaa\&lt;bbb
</code></pre>

<p>but I get:</p>

<pre><code>aaa\
</code></pre>

<p>This is the only sign that makes problems.</p>
