如何用 PHP 读取 XML 文件数据？

【问题标题】：How to read XML file data with Php?如何用 PHP 读取 XML 文件数据？
【发布时间】：2017-09-13 19:31:08
【问题描述】：

我有以下格式的xml文件。

<?xml version="1.0" encoding="utf-8" ?>
<rss version="2.0" xmlns:g="http://base.google.com/ns/1.0">  
  <channel>  
  <title>Data feed Title</title>
  <link>http://www.amarchitrakatha.com/in/</link>
  <description>Data feed description.</description>
    <item>ACKKALID0577
    <g:id><![CDATA[ACKKALID0577]]></g:id>
    <title><![CDATA[Kalidasa]]></title>
    <link><![CDATA[http://www.amarchitrakatha.com/in/kalidasa?fee=19&fep=1147]]></link>
    <g:price>70.00</g:price>
    <g:sale_price></g:sale_price>
    <description><![CDATA[Kalidas Owes His Fame To His Sanksrit Play Abhijnana-Shakuntala (Shakuntala Recognised By The Token Ring), The Long Epic Poem Kumara-Sambhava (Birth Of Kumara) And The Lyric Poem Meghaduta (Cloud Messenger). Kalidasa, Who Lived Some Time In The Middle Of The 4Th And Early 5Th Centuries A.D., Has Left No Account Of His Life. According To Popular Legend, He Owed His Ingenuity As Much To Goddess Kali’S Blessings As To His Own Talents.]]></description>
    <g:product_type><![CDATA[Amar Chitra Katha  > Visionaries > Singles]]></g:product_type>
    <g:google_product_category><![CDATA[]]></g:google_product_category>
    <g:image_link><![CDATA[http://www.amarchitrakatha.com/media/catalog/product/K/A/KALIDASA_0__5.jpg]]></g:image_link>
    <g:condition>new</g:condition>
    <g:availability>in stock</g:availability>
    <g:shipping_weight>0.09 kg</g:shipping_weight>
    <g:brand><![CDATA[]]></g:brand>
    <g:mpn><![CDATA[ACKKALID0577]]></g:mpn>
    <g:gtin><![CDATA[]]></g:gtin>
  </item>
  <item>ACKPRITH1413
    <g:id><![CDATA[ACKPRITH1413]]></g:id>
    <title><![CDATA[Prithviraj Chauhan]]></title>
    <link><![CDATA[http://www.amarchitrakatha.com/in/prithviraj-chauhan?fee=19&fep=1150]]></link>
    <g:price>70.00</g:price>
    <g:sale_price></g:sale_price>
    <description><![CDATA[Jaichand Was Furious! His Daughter Samyogita Had Eloped With Prithviraj Chauhan, The Warrior King Of Delhi. She, Like Many Others, Was Smitten By Tales Of His Daring, His Nobility And His Sense Of Honour. Though The Young Couple’S Happiness Was Doomed, Even In His Dying Hour, It Was The Brave Prithviraj Who Chose How His Life Should End.]]></description>
    <g:product_type><![CDATA[Amar Chitra Katha  > Brave Hearts Story > Singles]]></g:product_type>
    <g:google_product_category><![CDATA[]]></g:google_product_category>
    <g:image_link><![CDATA[http://www.amarchitrakatha.com/media/catalog/product/P/R/PRITHVIRAJ_CHAUHAN_0__4.jpg]]></g:image_link>
    <g:condition>new</g:condition>
    <g:availability>in stock</g:availability>
    <g:shipping_weight>0.09 kg</g:shipping_weight>
    <g:brand><![CDATA[]]></g:brand>
    <g:mpn><![CDATA[ACKPRITH1413]]></g:mpn>
    <g:gtin><![CDATA[]]></g:gtin>
  </item>
 </channel>
</rss>

通过使用simplexml_load_file，我没有得到项目的数据。如何用 PHP 解析这种格式的 XML？我想获取所有项目的数据，例如 g:id、title、link 等。

if (file_exists('Sample.xml')) {
$xml = simplexml_load_file('Sample.xml');
echo '<pre>';
print_r($xml->channel);
echo '</pre>';
} else {
exit('Failed to open Sample.xml.');
}

而 m 得到结果为 

SimpleXMLElement Object
(
[title] => Data feed Title
[link] => http://www.amarchitrakatha.com/in/
[description] => Data feed description.
[item] => Array
    (
        [0] => ACKKALID0577

        [1] => ACKPRITH1413
    )
)

我必须将项目的数据存储在特定变量中。

【问题讨论】：

  • 你的 php 版本是多少？
  • 您已包含您的 XML，但未包含您尝试用于导入它的代码。您能否包括您的代码以及对结果的更精确描述？ “没有获得项目的数据”可能是许多事情中的任何一个。检查您的错误日志，包括任何可疑的in your question。当你在做的时候，你可能想要更完整地描述你想对你的结果做什么；最好的方向通常是通过知道你的目的地来确定的。 :)
  • 我已经编辑了代码。

标签： php xml parsing


【解决方案1】：

我相信通过这种 xml 样式，您可以使用标准的 PHP xml 解析器（即http://ca2.php.net/manual/en/class.simplexmlelement.php） 将其加载到您的变量中（即 $xml） 然后像这样读取这些节点：

$xml=simplexml_load_string($yourXMLFile)
$xml->children('g', true)->id;

（上面会拉取所有 的实例）

没有测试我的结局。

【讨论】：

    【解决方案2】：

    您可以使用PHP DOMDocument 来完成它。正如我在下面的代码中所做的那样。

    Try this code snippet here

    <?php
ini_set('display_errors', 1);
$object= new DOMDocument();
$object->loadXML('<?xml version="1.0" encoding="utf-8" ?>
<rss version="2.0" xmlns:g="http://base.google.com/ns/1.0">  
  <channel>  
  <title>Data feed Title</title>
  <link>http://www.amarchitrakatha.com/in/</link>
  <description>Data feed description.</description>
    <item>ACKKALID0577
    <g:id><![CDATA[ACKKALID0577]]></g:id>
    <title><![CDATA[Kalidasa]]></title>
    <link><![CDATA[http://www.amarchitrakatha.com/in/kalidasa?fee=19&fep=1147]]></link>
    <g:price>70.00</g:price>
    <g:sale_price></g:sale_price>
    <description><![CDATA[Kalidas Owes His Fame To His Sanksrit Play Abhijnana-Shakuntala (Shakuntala Recognised By The Token Ring), The Long Epic Poem Kumara-Sambhava (Birth Of Kumara) And The Lyric Poem Meghaduta (Cloud Messenger). Kalidasa, Who Lived Some Time In The Middle Of The 4Th And Early 5Th Centuries A.D., Has Left No Account Of His Life. According To Popular Legend, He Owed His Ingenuity As Much To Goddess Kali’S Blessings As To His Own Talents.]]></description>
    <g:product_type><![CDATA[Amar Chitra Katha  > Visionaries > Singles]]></g:product_type>
    <g:google_product_category><![CDATA[]]></g:google_product_category>
    <g:image_link><![CDATA[http://www.amarchitrakatha.com/media/catalog/product/K/A/KALIDASA_0__5.jpg]]></g:image_link>
    <g:condition>new</g:condition>
    <g:availability>in stock</g:availability>
    <g:shipping_weight>0.09 kg</g:shipping_weight>
    <g:brand><![CDATA[]]></g:brand>
    <g:mpn><![CDATA[ACKKALID0577]]></g:mpn>
    <g:gtin><![CDATA[]]></g:gtin>
  </item>
  <item>ACKPRITH1413
    <g:id><![CDATA[ACKPRITH1413]]></g:id>
    <title><![CDATA[Prithviraj Chauhan]]></title>
    <link><![CDATA[http://www.amarchitrakatha.com/in/prithviraj-chauhan?fee=19&fep=1150]]></link>
    <g:price>70.00</g:price>
    <g:sale_price></g:sale_price>
    <description><![CDATA[Jaichand Was Furious! His Daughter Samyogita Had Eloped With Prithviraj Chauhan, The Warrior King Of Delhi. She, Like Many Others, Was Smitten By Tales Of His Daring, His Nobility And His Sense Of Honour. Though The Young Couple’S Happiness Was Doomed, Even In His Dying Hour, It Was The Brave Prithviraj Who Chose How His Life Should End.]]></description>
    <g:product_type><![CDATA[Amar Chitra Katha  > Brave Hearts Story > Singles]]></g:product_type>
    <g:google_product_category><![CDATA[]]></g:google_product_category>
    <g:image_link><![CDATA[http://www.amarchitrakatha.com/media/catalog/product/P/R/PRITHVIRAJ_CHAUHAN_0__4.jpg]]></g:image_link>
    <g:condition>new</g:condition>
    <g:availability>in stock</g:availability>
    <g:shipping_weight>0.09 kg</g:shipping_weight>
    <g:brand><![CDATA[]]></g:brand>
    <g:mpn><![CDATA[ACKPRITH1413]]></g:mpn>
    <g:gtin><![CDATA[]]></g:gtin>
  </item>
 </channel>
</rss>');
$tagValues=array("g:id","title","link");
$result=array();
foreach($object->getElementsByTagName("item") as $item)
{
    foreach($item->childNodes as $node)
    {
        if($node instanceof DOMElement)
        {
            if(in_array( $node->tagName,$tagValues))
            {
                $result[$node->tagName][]=$node->textContent;
            }
        }
    }
}
print_r($result);

    【讨论】：

    • 它给出了结果，但我必须将数据存储在特定变量中。
    • @Cvince 没问题，我正在更新我的帖子，几秒钟后
    • @Cvince 现在查看我的帖子并查看Try this code snippet 您可以在此查看之后您也可以使用extract。
    【解决方案3】：

    试试这个，测试过！

    $xml = simplexml_load_file('http://example.com/rss.xml');
$namespaces = $xml->getNamespaces(true);
var_dump($namespaces);

    输出：

    array(1) {
    ["g"]=> string(29) "http://base.google.com/ns/1.0"
}

    然后：

    foreach ($xml->channel->item as $item) 
{ 
    // for php >= 5.2.0
    // $id = (string) $item->children('g', TRUE)->id; 
    // for php < 5.2.0
    // $id = (string) $item->children('http://base.google.com/ns/1.0')->id; 
    $id = (string) $item->children($namespaces["g"])->id; // for php < 5.2.0
    $title = (string) $item->title; 
    $link  = (string) $item->link; 
    var_dump($id, $title, $link); 
    echo "--\n"; 
}

    输出：

    string(12) "ACKKALID0577"
string(8) "Kalidasa"
string(58) "http://www.amarchitrakatha.com/in/kalidasa?fee=19&fep=1147"
--
string(12) "ACKPRITH1413"
string(18) "Prithviraj Chauhan"
string(68) "http://www.amarchitrakatha.com/in/prithviraj-chauhan?fee=19&fep=1150"
--

    最后，例如为了将结果绑定到对象数组：

    $xml = simplexml_load_file('http://example.com/rss.xml');
$namespaces = $xml->getNamespaces(true);
$itemArray = array();
foreach ($xml->channel->item as $item) 
{ 
    $obj = new stdClass();
    $obj->id = (string) $item->children($namespaces["g"])->id; // for php < 5.2.0
    $obj->title = (string) $item->title; 
    $obj->link  = (string) $item->link; 
    $itemArray[] = $obj;
} 
var_dump($itemArray);

    输出：

    array(2) {
    [0]=> object(stdClass)#5 (3) {
        ["id"]=> string(12) "ACKKALID0577"
        ["title"]=> string(8) "Kalidasa"
        ["link"]=> string(58) "http://www.amarchitrakatha.com/in/kalidasa?fee=19&fep=1147"
    }
    [1]=> object(stdClass)#3 (3) {
        ["id"]=> string(12) "ACKPRITH1413"
        ["title"]=> string(18) "Prithviraj Chauhan"
        ["link"]=> string(68) "http://www.amarchitrakatha.com/in/prithviraj-chauhan?fee=19&fep=1150"
    }
}

    参考：http://php.net/manual/en/simplexmlelement.getnamespaces.php

    参考：http://php.net/manual/en/simplexmlelement.children.php

    参考：http://www.sitepoint.com/forums/showthread.php?606057-...

    【讨论】：

      【解决方案4】：

      你可以使用这个来循环 g: 属性中的值

      $handle_object = $element->children('g', true);

      【讨论】：

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