How to concatenate a string in PHP?
<p>I'm doing a string concatenation:</p>

<pre><code>$url = "http://www.majesticseo.com/reports/site-explorer/summary/"
       + $page['page_url'] + "&amp;IndexDataSource=F"
       ;
</code></pre>

<p>and this is what I get when I print it:</p>

<pre><code>0
</code></pre>

<p>where does the 0 come from?</p>
