<?
$kaynak = '<div class="dinle"><embed src="http://static.boomp3.com/player.swf?song=bzf1nk98e_f" type="application/x-shockwave-flash" wmode="transparent" allowscriptaccess="always" align="middle" height="20" width="300"><br>';

preg_match_all("#<div class=\"dinle\">(.*)<br>#si",$kaynak,$veriler);

echo $veriler[1][0];
?>