正则匹配嵌套div ,求PHP实现~

Question

如下html串:
$str = '<div class="am1">
    <div class="image">1111111111</div>
    <div class="image">2222222222</div>
    <a href="test.php">link1</a>
 </div>
 <div class="am1">
     <div class="image">1111111111</div>
     <img src="./tt.gif" />
     <div class="image">2222222222</div>
 </div>';
需要匹配出的结果:
    将<div class="am1">中的内容匹配出来, 即:
   1=>     
           <div class="image">1111111111</div>
           <div class="image">2222222222</div>
           <a href="test.php">link1</a>   2=>     
           <div class="image">1111111111</div>
           <img src="./tt.gif" />
           <div class="image">2222222222</div>
php程序实现,在线等~
        

Answer 1

$preg = '|<div[^>]*>[^<>]*(((?\'Open\'<div[^>]*>)[^<>]*)+((?\'-Open\'<\/div>)[^<>]*)+)*(?(Open)(?!))<\/div>|';
preg_match_all($preg,$str,$match);网上找解决方案,使用正则平衡组,如上正则,但是总是报错~~

Answer 2

$patten='/(<div class="am1">(*)</div>)/';
preg_match_all($patten,$str,$match);

Answer 3

没有这么简单.因为会有多个</div>,你应该从内层开始查找,然后一层一层的往外,知道匹配到<div class="am1"></div>为止

Answer 4

<?php
$str = '<div class="am1">
    <div class="image">1111111111</div>
    <div class="image">2222222222</div>
    <a href="test.php">link1</a>
</div>
<div class="am1">
     <div class="image">1111111111</div>
     <img src="./tt.gif" />
     <div class="image">2222222222</div>
</div>';
if (preg_match_all('#<div[^>]*>((?>[^</div>]+|<a.+?>.+?</a>|<img.+?/>|(?R))*)</div>#is', $str, $matches)){
print_r($matches);
}
 ?>