PHP coding practices
<p>When I get a variable and I don't know is it set or not I can write</p>

<pre><code>if(isset($a) &amp;&amp; $a&gt;2)
</code></pre>

<p>and I can write</p>

<pre><code>if(@$a&gt;2)
</code></pre>

<p>which is shorter.
Is the second syntax good or not?</p>
