PHP中简单而干净的xml操作

2022-01-10 00:00:00 xml xml-parsing php

我正在尝试寻找一种在 php 中轻松修改 xml 的方法.PHP 文档对于如何轻松操作 xml 非常混乱.我喜欢 SimpleXml 允许轻松查找标签/属性的方式，但它似乎不允许您轻松添加子树或替换现有的.

I'm trying to search for a way to easily modify xml in php. The PHP documentation is very confusing regarding how to easily manipulate xml. I like how SimpleXml allows for easily finding tags/attributes, but it doesn't seem to allow you to easily add child trees, or replace existing ones.

有什么建议吗?

我的用例包括:

  • 查找具有特定属性的特定标签元素.
  • 替换找到的元素子树.
  • 使用从 xml 文本生成的子树.

推荐答案

我使用 XPATH 和 SimpleXML 来更改我的文件.一个小例子……

I use XPATH and SimpleXML to change my file. A little example...

xml文件:

<?xml version="1.0"?>

<forum uri="http://myforum.org/index.php">

    <item id="1">
        <title>First Post!!!</title>
        <link>http://myforum.org/index.php/m/1</link>
        <description>hello I'm fabio</description>
    </item>

    <item id="2">
        <title>Re: Second post!!!</title>
        <link>http://myforum.org/index.php/m/2</link>
        <description>2nd good message.</description>
    </item>
</forum>

和 PHP 处理程序:

And PHP handler:

<?php

$forum = simplexml_load_file('forum.xml');

/* some xpath EXAMPLES */   
/* catch all items in forum */
$result = $forum->xpath('/forum/item');
/* catch all links */
$result = $forum->xpath('//link');
/* search for "Re:" in title and returns the item's id */
$result = $forum->xpath('//item[contains(title, "Re:")]/@id');
/* catch > 10 length items and returns the item's title*/
$result = $forum->xpath('//item[string-length(description) > 10]/title');

$forum->item[1]->title['url']   = "http://goo.gl/";     /* this add a an attribute */
$forum->item[0]->foo            = "newnode";            /* this add content */
$forum->item[0]->foo['attrib']  = 10;                   /* this add a another value */
$forum->addChild('element_name', 'value');              /* this is a new element /*

 /* delete value */
unset($forum->item[0]);


// XML rendering
echo $forum->asXML();

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