PHP coding practices
<p>If 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>or I can write</p>

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

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