Default value of variables in PHP?
<p>I did a search for this, but I could not find an answer to my question.</p>

<p>When a variable is declared without a value, like this:</p>

<pre><code>$var;
public $aVar;
</code></pre>

<p>Is the value of the variable unknown, as in many languages (i.e. whatever was in memory before), or is the variable by default set to <code>null</code>?</p>
