Why does PHP replaces . with an underscore if it's a key in $_GET?
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/283751/php-replaces-spaces-with-underlines">PHP replaces spaces with underlines</a>  </p>
</blockquote>



<p>Example: test.php?foo.bar=1</p>

<pre><code>print_r($_GET);

// Array ( [foo_bar] =&gt; 1 ) 
</code></pre>
