difference in 'category-".$row['id'].".php' and 'category-.php".$row['id']."'
<p>I am confused and couldn't figure out the difference between these two lines!!</p>

<pre><code>echo "&lt;li&gt;&lt;a href='category-".$row['id'].".php' &gt;".$row['name']."&lt;/a&gt;&lt;/li&gt;";
</code></pre>

<p>The first one echos categories I displayed in a home page. It works fine and I don't have to create the category.php file.</p>

<pre><code>echo "&lt;li&gt;&lt;a href='category-.php".$row['id']."' &gt;".$row['name']."&lt;/a&gt;&lt;/li&gt;";
</code></pre>

<p>But the second code it tells me file doesn't exist. </p>

<p>So my question is, why the first code doesn't require the file but the second code does?</p>
