再求个正则表达式

Question

现在有这么一大段内容：
$str = "<br><strong><p>......<br /> 
  <object classid="CLSID:6BF52A52-394A-11d3-B153-00C04F79FAA6" width="500" height="400"><param name="url" value="VLS_B1U1P2C1AB.wmv" /><param name="autostart" value="false" /><param name="showcontrols" value="true" /> 
  </object></p>......<br />......<br />......<br />......<br />......<br />......<br /></strong><br>";我想把<object ......></object>这段去掉，变成
$str = "<br><strong><p>......<br /></p>......<br />......<br />......<br />......<br />......<br />......<br /></strong><br>";preg_replace('/(<object)+?([^\/])+(</object>)/is', '', $str);用了上面这个之后，后面全部没有了。还有如何学习正则表达式啊，谢谢

Answer 1

$s = <<<s
<br><strong><p>......<br />  
  <object classid="CLSID:6BF52A52-394A-11d3-B153-00C04F79FAA6" width="500" height="400"><param name="url" value="VLS_B1U1P2C1AB.wmv" /><param name="autostart" value="false" /><param name="showcontrols" value="true" />  
  </object></p>......<br />......<br />......<br />......<br />......<br />......<br /></strong><br>;
s;
$s = preg_replace('/<object.*>.*<\/object>/is', '', $s);
echo $s;

Answer 2

“还有如何学习正则表达式啊”多看手册，多练习
http://www.php.net/manual/en/reference.pcre.pattern.syntax.php