重新排序阵列属性然后再保存到PHP的XML

本文介绍了重新排序阵列属性然后再保存到PHP的XML的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有这样的XML：

<picture id="2"> <title>B</title> </picture> <picture id="3"> <title>C</title> </picture> <picture id="0"> <title>A</title> </picture>

努力实现这一点：

Trying to achieve this:

<picture id="1"> <title>B</title> </picture> <picture id="2"> <title>C</title> </picture> <picture id="0"> <title>A</title> </picture>

使用该得到的id属性值的列表：

Using this to get a list of 'id' attribute values:

$objXML = new SimpleXMLElement(XML_FILE_NAME, null, true); $picture = $objXML->xpath('picture'); $arrayCurrent = array(); foreach($picture as $value) { $arrayCurrent[] = (string)$value['id']; } sort($arrayCurrent); // put XML into numerical 'id' order print_r($arrayCurrent);

它返回：阵列（[0] => 0 [1] => 2 [2] => 3）任何想法如何重新建立索引像这样：0，1，2并保存相应的'ID'在XML文档属性回到正确的位置。

It returns: Array ( [0] => 0 [1] => 2 [2] => 3 ) Any ideas how to re-index like so: 0, 1, 2 and save the appropriate 'id' attributes back to their correct positions in the XML doc?

谢谢，安迪

推荐答案

数字ID为了保持并取得连续的：

Numerical id order is maintained and made consecutive:

$objXML = new SimpleXMLElement(XML_FILE_NAME, null, true); $picture = $objXML->xpath('picture'); usort($picture, create_function('$a,$b', 'return (string)$a["id"] - (string)$b["id"];')); foreach ($pictures as $index => $node) $node["id"] = $index;