<?php
	$content = '<img class="alignnone size-full wp-image-333" title="resim333" src="http://www.xyzsitesi.com/wp-content/uploads//2010/08/resim333.jpeg" alt="" width="167" height="253" />';
	preg_match('~<img class="(.*?)" title="(.*?)" src="http://www.xyzsitesi.com/wp-content/uploads//(.*?)" alt="" width="(.*?)" height="(.*?)" />~si', $content, $image);
	print_r($image[3]);
?>