求一段php正则替换规则

Question

/e/tags/index.php?page=23&tagname=%B9%D8%D3%DA%D3%D1%D2%EA%D5%E4%B9%F3%B5%C4%B8%F1%D1%D4&line=3&tempid=13用preg_replace()把这样的替换成
/tag-%B9%D8%D3%DA%D3%D1%D2%EA%D5%E4%B9%F3%B5%C4%B8%F1%D1%D4/23/当page=0的时候替换成
/tag-%B9%D8%D3%DA%D3%D1%D2%EA%D5%E4%B9%F3%B5%C4%B8%F1%D1%D4/

Answer 1

$str="/e/tags/index.php?page=0&tagname=%B9%D8%D3%DA%D3%D1%D2%EA%D5%E4%B9%F3%B5%C4%B8%F1%D1%D4&line=3&tempid=13";
$s= preg_replace_callback(
     '#.+?page=(\d+)&tagname=([^&]+)&.+#',
     create_function(
            '$matches',
            'return "/tag-$matches[2]/". ($matches[1] ? $matches[1]."/" : "");'
        ),
$str
);
echo $s;
/tag-%B9%D8%D3%DA%D3%D1%D2%EA%D5%E4%B9%F3%B5%C4%B8%F1%D1%D4/

Answer 2

非常感谢 每次都是你帮我解决到问题 谢谢
顺便帮我看下这个吧
http://bbs.csdn.net/topics/390575116

Answer 3

请教一下
<a title="总数">&nbsp;<b>5</b> </a>&nbsp;&nbsp;<a href="/e/tags/index.php?page=0&amp;tagname=关于友谊珍贵的格言&amp;line=3&amp;tempid=13">首页</a>&nbsp;<a href="/e/tags/index.php?page=0&amp;tagname=关于友谊珍贵的格言&amp;line=3&amp;tempid=13">上一页</a>&nbsp;<a href="/e/tags/index.php?page=0&amp;tagname=关于友谊珍贵的格言&amp;line=3&amp;tempid=13">1</a>&nbsp;<b>2</b>
为什么这一段替换不掉呢？