PHP 简单处理 XML

素颜马尾好姑娘i 2021-09-30 03:40 334阅读 0赞

一、手动输出xml

/*
     * 手动输出xml
     */
    header("Content-Type:text/xml");
    print '<?xml version="1.0"?>'."\n";
    print "<shows>\n";
    
    $shows = array(
                    array(
                            'name' => 'aa',
                            'channel' => 'a1',
                            'start' => 'a2'
                    ),
                    array(
                            'name' => 'bb',
                            'channel' => 'b1',
                            'start' => 'b2'
                    ),
                    array(
                            'name' => 'cc',
                            'channel' => 'c1',
                            'start' => 'c2'
                    )
    );
    foreach($shows as $show)
    {
        print "<show>\n";
        foreach($show as $tag => $val)
        {
            print "<$tag>".htmlspecialchars($val)."</$tag>\n";
        }
        print "</show>\n";
    }
    print "</shows>\n";
    
    /**
    <?xml version="1.0"?>
    <shows>
    <show>
    <name>aa</name>
    <channel>a1</channel>
    <start>a2</start>
    </show>
    <show>
    <name>bb</name>
    <channel>b1</channel>
    <start>b2</start>
    </show>
    <show>
    <name>cc</name>
    <channel>c1</channel>
    <start>c2</start>
    </show>
    </shows>
    **/

二、通过DOMDocument生成xml

/*
     * 通过DOMDocument生成xml
     */
    
    // 创建新文档
    $dom = new DOMDocument("1.0", "UTF-8");
    // 创建根元素humans，并将其添加至文档
    $humans = $dom->appendChild($dom->createElement("humans"));
    // 创建根元素zhangying，并将其添加至humans
    $zhangying = $humans->appendChild($dom->createElement("zhangying"));
    // 创建name元素，并将其添加至zhangying
    $name = $zhangying->appendChild($dom->createElement("name"));
    $name->appendChild($dom->createTextNode("张映"));
    $sex = $zhangying->appendChild($dom->createElement("sex"));
    $sex->appendChild($dom->createTextNode("男"));
    $old = $zhangying->appendChild($dom->createElement("old"));
    $old->appendChild($dom->createTextNode("28"));
    
    // 创建根元素tank，并将其添加至humans
    $tank = $humans->appendChild($dom->createElement("tank"));
    // 创建name元素，并将其添加至tank
    $name = $tank->appendChild($dom->createElement("name"));
    $name->appendChild($dom->createTextNode("tank"));
    $sex = $tank->appendChild($dom->createElement("sex"));
    $sex->appendChild($dom->createTextNode("男"));
    $old = $tank->appendChild($dom->createElement("old"));
    $old->appendChild($dom->createTextNode("28"));
    
    
    /*// 设置author元素
    $author = $book->appendChild($dom->createElement("author"));
    $author->appendChild($dom->createTextNode("zhangh"));
    $author->setAttribute("class", "win_close");*/
    
    // 输出
    $dom->formatOutput = true;
    header('Content-Type:text/xml');
    echo $dom->saveXML();
    
    // 将文档表现形式放于book变量中
    //$book = $dom->saveXML();
    // 将文档输出为book.xml文件
    //$dom->save("humans.xml");
    
    /**
        <?xml version="1.0 encoding="UTF-8"?>
        <humans>
        <zhangying>
        <name>张映</name>
        <sex>男</sex>
        <old>28</old>
        </zhangying>
        <tank>
        <name>tank</name>
        <sex>男</sex>
        <old>28</old>
        </tank>
        </humans> 
     **/

三、xml的读取

/*
     * xml的读取
     */
    
    // 1. 利用simplexml_load_file读取简单的xml文件
    $humans = simplexml_load_file("humans.xml");
    
    foreach($humans as $key => $human)
    {
        echo $human->name."->".$human->sex."->".$human->old."\n";
    }
    
    /**
    张映->男->28
    tank->男->28
    **/
    
    
    // 2. 利用DOMDocument读取xml
    $dom = new DOMDocument();
    $dom->load("humans.xml");
    $humans = $dom->getElementsByTagName("humans");
    
    foreach($humans as $key=>$human)
    {
    	$names = $human->getElementsByTagName("name");
    	$olds = $human->getElementsByTagName("old");
    	$sexes = $human->getElementsByTagName("sex");
    	foreach($names as $k=>$name)
    	{
    		$name = $names->item($k)->nodeValue;
    		$sex = $sexes->item($k)->nodeValue;
    		$old = $olds->item($k)->nodeValue;
    		
    		echo "$name->$sex->$old\n";
    	}
    }
    
    /**
    张映->男->28
    tank->男->28
    **/
    
    
    // 3. 利用正则来获取数据
    $xml = '';
    $f = fopen("humans.xml", "r");
    while($data = fread($f, 2096))
    {
    	$xml .= $data;
    }
    fclose($f);
    
    preg_match_all('/\<humans\>(.*?)\<\/humans\>/s', $xml, $humans);
    
    foreach($humans[1] as $human)
    {
    	preg_match_all('/\<name\>(.*?)\<\/name\>/s', $human, $names);
    	preg_match_all('/\<sex\>(.*?)\<\/sex\>/s', $human, $sexes);
    	preg_match_all('/\<old\>(.*?)\<\/old\>/s', $human, $olds);
    }
    
    foreach($names[1] as $k=>$name)
    {
    	echo $names[1][$k].'-'.$sexes[1][$k].'-'.$olds[1][$k]."\n";
    }
    
    /**
    张映->男->28
    tank->男->28
    **/
    
    
    // 4. 利用XMLReader获取数据
    $reader = new XMLReader();
    $reader->open("humans.xml");
    $i = 1;
    while($reader->read())
    {
    	if($reader->nodeType == XMLReader::TEXT)
    	{	
    		if($i%3)
    		{
    			echo $reader->value;
    		}else
    		{
    			echo $reader->value."\n";
    		}
    		$i++;
    	}
    }
    
    /**
    张映男28
    tank男28
    **/