regular expression to the following string
<p>let me know I can use that expression to extract the url in the following code</p>

<pre><code>&lt;div class="bg-movie alpha omega"&gt;
&lt;img class="alignnone size-full wp-image-7282" 
         title="CineMundo Tu Mejor Lugar El Caballero de la Noche Asciende" 
         src="http://www.cinemundo.cl/sitio/wp-content/uploads/2012/05/cinemundo_batman_el-caballero-de-la-noche-asciende_estrenos-2012.jpg" 
         alt="Película El Caballero de la Noche Asciende - Estrenos 2012" 
         width="117" height="173"&gt;
&lt;/div&gt; 
</code></pre>

<p>and come to this but I do not work well</p>

<pre><code>preg_match_all('/&lt;img [class="bg-movie alpha omega"]*src=["|\']([^"|\']+)/i', $html, $images);
</code></pre>
