PHP SimpleXMLElement:XML檔案解析與讀寫
- WBOY原創
- 2016-07-28 08:26:091143瀏覽
PHP保存XML文件
<code><span>$xml</span><span>=</span><span>new</span> SimpleXMLElement(<span>XML</span>数据);
<span>$xml</span><span>-></span>asXML(文件名);</code>
PHP讀取XML文件
<code><span>XXX</span>=<span> simplexml_load_file(文件名);</span></code>
1.使用面向對象方式訪問XML
<code><span><?php</span><span><span>class</span><span>XmlTest</span>
{</span><span>private</span><span>$filename</span> = <span>"a.xml"</span>;
<span>private</span><span>$isreading</span>=<span>false</span>;
<span>private</span><span>$rxml</span>;
<span>//创建XML文件</span><span>public</span><span><span>function</span><span>writeTest</span><span>()</span>
{</span><span>$_data</span> = <span><<<data
<?xml version="1.0" encoding="UTF-8"?>
<root>
<data>A</data>
<data>B</data>
<data>C</data>
<from>
<name fristname='陈'>老四</name>
<arg>30</arg>
</from>
<heading>Reminder</heading>
<body>Don't forget the meeting!</body>
</root>
data;</span><span>$xml</span> = <span>new</span> SimpleXMLElement(<span>$_data</span>);
<span>$xml</span>->asXML(<span>$this</span>->filename);
}
<span>//读取文件</span><span>private</span><span><span>function</span><span>readFile</span><span>()</span>
{</span><span>if</span>(!<span>$this</span>->isreading)
{
<span>$this</span>->rxml= simplexml_load_file(<span>$this</span>->filename);
<span>$this</span>->isreading=<span>true</span>;
}
}
<span>//测试:遍历某一数组</span><span>public</span><span><span>function</span><span>readdata</span><span>()</span>
{</span><span>$this</span>->readFile();
<span>foreach</span> (<span>$this</span>->rxml->data <span>as</span><span>$x</span>) {
<span>echo</span><span>"["</span>.<span>$x</span>.<span>"]"</span>;
}
<span>echo</span><span>"<br>"</span>;
}
<span>//测试 用数组下标读取数组某一项</span><span>public</span><span><span>function</span><span>readdata1</span><span>()</span>
{</span><span>$this</span>->readFile();
<span>echo</span><span>"读取第[1]个data数据:"</span>;
<span>echo</span><span>$this</span>->rxml->data[<span>1</span>] .<span>"<br>"</span>;
}
<span>//测试:读取2级XML节点</span><span>public</span><span><span>function</span><span>readfrom</span><span>()</span>
{</span><span>$this</span>->readFile();
<span>echo</span><span>"读取from节点:"</span>;
<span>echo</span><span>$this</span>->rxml->from->name .<span>','</span>;
<span>echo</span><span>$this</span>->rxml->from->arg.<span>"<br>"</span>;
<span>//读取name节点的fristname属性</span><span>echo</span><span>$this</span>->rxml->from->name[<span>'fristname'</span>].<span>"<br>"</span>;
}
}
<span>$tmp</span> = <span>new</span> XmlTest();
<span>$tmp</span>->writeTest();
<span>$tmp</span>->readdata();
<span>$tmp</span>->readdata1();
<span>$tmp</span>->readfrom();
<span>?></span></code>
瀏覽器列印:
<code>[<span>A</span>][<span>B</span>][<span>C</span>] 读取第[1]个data数据:B 读取from数据:老四,30 陈</code>
2.使用xpath存取XML., 用路徑取得節點，區別:取得的節點都以陣列傳回,因此用陣列下標存取
<code><span>public</span><span><span>function</span><span>readdata_xpath</span><span>()</span> {</span><span>$this</span>->readFile();
<span>$data</span>= <span>$this</span>->rxml->xpath(<span>'/root/data'</span>);
<span>foreach</span> (<span>$data</span><span>as</span><span>$x</span>) {
<span>echo</span><span>"["</span>.<span>$x</span>.<span>"]"</span>;
}
<span>echo</span><span>"<br>"</span>;
}
<span>public</span><span><span>function</span><span>readdata1_xpath</span><span>()</span>
{</span><span>$this</span>->readFile();
<span>$data1</span> = <span>$this</span>->rxml->xpath(<span>'/root/data'</span>);
<span>echo</span><span>"读取第[1]个data数据:"</span>;
<span>echo</span><span>$data1</span>[<span>1</span>] .<span>"<br>"</span>;
}
<span>public</span><span><span>function</span><span>readfrom_xpath</span><span>()</span>
{</span><span>$this</span>->readFile();
<span>$name</span>= <span>$this</span>->rxml->xpath(<span>'/root/from/name'</span>);
<span>$arg</span>= <span>$this</span>->rxml->xpath(<span>'/root/from/arg'</span>);
<span>echo</span><span>"读取from数据:"</span>;
<span>echo</span><span>$name</span>[<span>0</span>] .<span>','</span>;
<span>echo</span><span>$arg</span>[<span>0</span>].<span>"<br>"</span>;
<span>//读取name节点的fristname属性</span><span>echo</span><span>$name</span>[<span>0</span>][<span>'fristname'</span>].<span>"<br>"</span>;
}</code>
<code>$tmp->readdata_xpath(); $tmp->readdata1_xpath(); $tmp->readfrom_xpath(); <span>*****</span><span>*****</span><span>*****</span><span>***</span> 浏览器打印: [<span>A</span>][<span>B</span>][<span>C</span>] 读取第[1]个data数据:B 读取from数据:老四,30 陈</code>').addClass('pre-numbering').hide(); $(this).addClass('has-numbering').parent().append($numbering); for (i = 1; i ').text(i)); }; $numbering.fadeIn(1700); }); });
以上就介紹了 PHP SimpleXMLElement:XML檔案解析和讀寫，包含了方面的內容，希望對PHP教學有興趣的朋友有幫助。
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