PHP underscore in filename variable?
<p>Why is there an underscore for data_?</p>

<p>Is there a simpler way of writing this, so that it makes more sense in terms of code readability?</p>

<p>My analysis:</p>

<p>data_ is supposed to take whatever data_ is, request a message via the variable <code>postmessage</code> from the form and make sure it's text and concatenate all this:</p>

<pre><code> $filename = 'data_'.$_REQUEST['postmessage'].'.txt';
</code></pre>

<p>I am a beginner and my analysis of this code could be wrong, but I am willing to learn from my mistakes.</p>
