是否可以使用simplexml更新xml的节点属性?示例:我的程序其实是一个教师问答编辑器,作为一名教师,我想编辑一个特定的问题属性。即
<Quiz>
<topic text="Preparation for Exam">
<subtopic text="Math">
<question text="1 + 1 = ?">
<answer num="A" Text="1" />
<answer num="B" Text="2" />
<answer num="C" Text="3" />
<answer num="D" Text="4" />
</question>
<question text="4 * 4 = ?" >
<answer num="A" Text="12" />
<answer num="B" Text="14" />
<answer num="C" Text="16" />
<answer num="D" Text="18" />
</question>
</subtopic>
</topic>
</Quiz>
是可能的吗?虽然我已经尝试了很多方法,即删除以前的节点,然后插入编辑过的一个。但这个技巧只适用于最后一个节点…对于其他节点,它只执行交换
<?php
$subtopic = new SimpleXMLELement(data());
$subtopic->question[1]['text'] = 'lalala';
$subtopic->question[1]['foo'] = 'bar';
foreach( $subtopic->question[1]->answer as $answer) {
$answer['Text'] .= '(dez)';
}
echo $subtopic->asXML();
function data() {
return <<< eox
<subtopic text="Math">
<question text="1 + 1 = ?">
<answer num="A" Text="1" />
<answer num="B" Text="2" />
<answer num="C" Text="3" />
<answer num="D" Text="4" />
</question>
<question text="4 * 4 = ?" >
<answer num="A" Text="12" />
<answer num="B" Text="14" />
<answer num="C" Text="16" />
<answer num="D" Text="18" />
</question>
</subtopic>
eox;
}
打印
<?xml version="1.0"?>
<subtopic text="Math">
<question text="1 + 1 = ?">
<answer num="A" Text="1"/>
<answer num="B" Text="2"/>
<answer num="C" Text="3"/>
<answer num="D" Text="4"/>
</question>
<question text="lalala" foo="bar">
<answer num="A" Text="12(dez)"/>
<answer num="B" Text="14(dez)"/>
<answer num="C" Text="16(dez)"/>
<answer num="D" Text="18(dez)"/>
</question>
</subtopic>