一个字符串偏题

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Release： 2016-06-13 12:52:15

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一个字符串难题~

本帖最后由 xjl756425616 于 2013-03-06 14:34:05 编辑

<?php<br />
$a="<fieldset>1<fieldset>2<fieldset>3<fieldset>4</fieldset></fieldset></fieldset></fieldset>";<br />
echo $a;<br />
?>

Copy after login

最终结果要变成

$a="<fieldset>1<fieldset>2<fieldset>4</fieldset></fieldset></fieldset>";

Copy after login

把第3个去掉~~~

怎么做的？

------解决方案--------------------

<br />
$a="<fieldset>1<fieldset>2<fieldset>3<fieldset>4</fieldset></fieldset></fieldset></fieldset>";<br />
$aa=preg_replace("/((<fieldset>[^<]+){2})(<fieldset>[^<]+((<fieldset>[^<]+<\/fieldset>)*)<\/fieldset>)((<\/fieldset>){2})/isU", "\\1\\4\\6", $a);<br />
echo $aa;<br />

Copy after login

是不是这样
{}里的数字可以改，想这里写2是因为第三个

前有两个

确实不轻松楼主给分哈

Related labels：

fieldset gt lt nbsp

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