替换字符串的问题

Question

不用js，想将替换字符串width="80" height="80",如何写呢？
传入字符串<img width="200" src="http://www.macaucentral.com/dev/images/stories/jreviews/649_Image00001_1304589016.jpg">传出字符串<img width="80" height="80" src="http://www.macaucentral.com/dev/images/stories/jreviews/649_Image00001_1304589016.jpg">

Answer 1

echo str_replace('width="200"','width="80" height="80"',$str);

Answer 2

<?php
$str='<img width="200" src="http://www.macaucentral.com/dev/images/stories/jreviews/649_Image00001_1304589016.jpg">';
echo preg_replace('/width="\d+"/','width="80" height="80"',$str);???

Answer 3

如果要在前台展示的时候动态替换的话那就非js莫属了。
要是后台那就php处理吧