那些遇到过的问题

使用php SimpleXML解析XML命名空间

Tex*_*n78 10 php xml

我知道这已被问过很多次,但是我无法得到任何建议来处理我的情况,我已经在网上搜索并尝试了所有内容,但没有任何作用.我只需要使用命名空间限制解析这个XML:只需要四个条目.

<?xml version="1.0" encoding="UTF-8"?>
<entry>
    <id>http://alerts.weather.gov/cap/wwacapget.php?x=TX124EFFB832F0.SpecialWeatherStatement.124EFFB84164TX.LUBSPSLUB.ac20a1425c958f66dc159baea2f9e672</id>
    <updated>2013-05-06T20:08:00-05:00</updated>
    <published>2013-05-06T20:08:00-05:00</published>
    <author>
        <name>w-nws.webmaster@noaa.gov</name>
    </author>
    <title>Special Weather Statement issued May 06 at 8:08PM CDT by NWS</title>
    <link href="http://alerts.weather.gov/cap/wwacapget.php?x=TX124EFFB832F0.SpecialWeatherStatement.124EFFB84164TX.LUBSPSLUB.ac20a1425c958f66dc159baea2f9e672"/>
    <summary>...SIGNIFICANT WEATHER ADVISORY FOR COCHRAN AND BAILEY COUNTIES... AT 808 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 30 MILES NORTHWEST OF MORTON...MOVING SOUTHEAST AT 25 MPH. NICKEL SIZE HAIL...WINDS SPEEDS UP TO 40 MPH...CONTINUOUS CLOUD TO GROUND LIGHTNING...AND BRIEF MODERATE DOWNPOURS ARE POSSIBLE WITH</summary>
    <cap:event>Special Weather Statement</cap:event>
    <cap:effective>2013-05-06T20:08:00-05:00</cap:effective>
    <cap:expires>2013-05-06T20:45:00-05:00</cap:expires>
    <cap:status>Actual</cap:status>
    <cap:msgType>Alert</cap:msgType>
    <cap:category>Met</cap:category>

    <cap:urgency>Expected</cap:urgency>
    <cap:severity>Minor</cap:severity>
    <cap:certainty>Observed</cap:certainty>
    <cap:areaDesc>Bailey; Cochran</cap:areaDesc>
    <cap:polygon>34.19,-103.04 34.19,-103.03 33.98,-102.61 33.71,-102.61 33.63,-102.75 33.64,-103.05 34.19,-103.04</cap:polygon>
    <cap:geocode>
        <valueName>FIPS6</valueName>
        <value>048017 048079</value>
        <valueName>UGC</valueName>

        <value>TXZ027 TXZ033</value>
    </cap:geocode>
    <cap:parameter>
        <valueName>VTEC</valueName>
        <value>
        </value>
    </cap:parameter>
</entry>
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我使用的是simpleXML,我设置了一个简单的小型测试脚本,它非常适合解析常规元素.我不能为我的狄更斯找到或得到一种方法来解析命名空间的元素.

这是一个小样本测试脚本,包含我正在使用的代码,非常适合解析简单元素.我如何使用它来解析命名空间？我尝试过的一切都行不通.我需要它能够创建变量,所以我可以将它们嵌入到HTML中以用于样式.

<?php 

$html = "";  

// Get the XML Feed
$data = "http://alerts.weather.gov/cap/tx.php?x=1";


// load the xml into the object
$xml = simplexml_load_file($data);

for ($i = 0; $i < 10; $i++){
    $title = $xml->entry[$i]->title;
    $summary = $xml->entry[$i]->summary;

    $html .= "<p><strong>$title</strong></p><p>$summary</p><hr/>";

}

 echo $html; 
?>
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这适用于解析常规元素,但是在父条目下使用cap:namespace的那些元素呢？

<?php
ini_set('display_errors','1');

$html = "";
$data = "http://alerts.weather.gov/cap/tx.php?x=1";
$entries = simplexml_load_file($data);
if(count($entries)):
    //Registering NameSpace
    $entries->registerXPathNamespace('prefix', 'http://www.w3.org/2005/Atom');
    $result = $entries->xpath("//prefix:entry");
    //echo count($asin);
    //echo "<pre>";print_r($asin);
    foreach ($result as $entry):
        $title = $entry->title;
        $summary = $entry->summary;

        $html .= "<p><strong>$title</strong></p><p>$summary</p>$event<hr/>";

    endforeach;
endif;

echo $html;

?>
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任何帮助将不胜感激.

-谢谢

Nul*_*ter 15

我在这里给出了相同类型的答案- 解决你的问题

您只需要注册Namespace,然后就可以使用simplexml_load_file和XPath正常工作

<?php
$data = "http://alerts.weather.gov/cap/tx.php?x=1";
$entries = file_get_contents($data);
$entries = new SimpleXmlElement($entries);
if(count($entries)):
    //echo "<pre>";print_r($entries);die;
    //alternate way other than registring NameSpace
    //$asin = $asins->xpath("//*[local-name() = 'ASIN']");

    $entries->registerXPathNamespace('prefix', 'http://www.w3.org/2005/Atom');
    $result = $entries->xpath("//prefix:entry");
    //echo count($asin);
    //echo "<pre>";print_r($result);die;
    foreach ($result as $entry):
        //echo "<pre>";print_r($entry);die;
        $dc = $entry->children('urn:oasis:names:tc:emergency:cap:1.1');
        echo $dc->event."<br/>";
        echo $dc->effective."<br/>";
        echo "<hr>";
    endforeach;
endif;
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而已.

Rol*_*oro 5

这是一个替代解决方案：

<?php
$xml = <<<XML
<?xml version = '1.0' encoding = 'UTF-8' standalone = 'yes'?>
<?xml-stylesheet href='http://alerts.weather.gov/cap/capatom.xsl' type='text/xsl'?>

<!--
This atom/xml feed is an index to active advisories, watches and warnings 
issued by the National Weather Service.  This index file is not the complete 
Common Alerting Protocol (CAP) alert message.  To obtain the complete CAP 
alert, please follow the links for each entry in this index.  Also note the 
CAP message uses a style sheet to convey the information in a human readable 
format.  Please view the source of the CAP message to see the complete data 
set.  Not all information in the CAP message is contained in this index of 
active alerts.
-->

<feed
    xmlns = 'http://www.w3.org/2005/Atom'
    xmlns:cap = 'urn:oasis:names:tc:emergency:cap:1.1'
    xmlns:ha = 'http://www.alerting.net/namespace/index_1.0'
    >
<!-- http-date = Tue, 07 May 2013 04:14:00 GMT -->

<id>http://alerts.weather.gov/cap/tx.atom</id>
<logo>http://alerts.weather.gov/images/xml_logo.gif</logo>
<generator>NWS CAP Server</generator>
<updated>2013-05-06T23:14:00-05:00</updated>
<author>
    <name>w-nws.webmaster@noaa.gov</name>
</author>
<title>Current Watches, Warnings and Advisories for Texas Issued by the National Weather Service</title>
<link href='http://alerts.weather.gov/cap/tx.atom'/>

<entry>
    <id>http://alerts.weather.gov/cap/wwacapget.php?x=TX124EFFB8AA78.FireWeatherWatch.124EFFD70270TX.EPZRFWEPZ.1716207877d94d15d43d410892b9f175</id>
    <updated>2013-05-06T23:14:00-05:00</updated>
    <published>2013-05-06T23:14:00-05:00</published>
    <author>
        <name>w-nws.webmaster@noaa.gov</name>
    </author>
    <title>Fire Weather Watch issued May 06 at 11:14PM CDT until May 08 at 10:00PM CDT by NWS</title>
    <link href="http://alerts.weather.gov/cap/wwacapget.php?x=TX124EFFB8AA78.FireWeatherWatch.124EFFD70270TX.EPZRFWEPZ.1716207877d94d15d43d410892b9f175"/>
    <summary>...CRITICAL FIRE CONDITIONS EXPECTED WEDNESDAY ACROSS FAR WEST TEXAS AND THE SOUTHWEST NEW MEXICO LOWLANDS... .WINDS ALOFT WILL STRENGTHEN OVER THE REGION EARLY THIS WEEK...AHEAD OF AN UPPER LEVEL TROUGH FORECAST TO MOVE THROUGH NEW MEXICO AND TEXAS ON WEDNESDAY. SURFACE LOW PRESSURE WILL ALSO DEVELOP TO OUR EAST AS THE TROUGH APPROACHES. THIS COMBINATION WILL RESULT</summary>
    <cap:event>Fire Weather Watch</cap:event>
    <cap:effective>2013-05-06T23:14:00-05:00</cap:effective>
    <cap:expires>2013-05-08T22:00:00-05:00</cap:expires>
    <cap:status>Actual</cap:status>
    <cap:msgType>Alert</cap:msgType>
    <cap:category>Met</cap:category>
    <cap:urgency>Future</cap:urgency>
    <cap:severity>Moderate</cap:severity>
    <cap:certainty>Possible</cap:certainty>
    <cap:areaDesc>El Paso; Hudspeth</cap:areaDesc>
    <cap:polygon></cap:polygon>
    <cap:geocode>
        <valueName>FIPS6</valueName>
        <value>048141 048229</value>
        <valueName>UGC</valueName>
        <value>TXZ055 TXZ056</value>
    </cap:geocode>
    <cap:parameter>
        <valueName>VTEC</valueName>
        <value>/O.NEW.KEPZ.FW.A.0018.130508T1900Z-130509T0300Z/</value>
    </cap:parameter>
</entry>

<entry>
    <id>http://alerts.weather.gov/cap/wwacapget.php?x=TX124EFFABB2F0.AirQualityAlert.124EFFC750DCTX.HGXAQAHGX.7f2cf548a67d403f0541492b2804d621</id>
    <updated>2013-05-06T14:16:00-05:00</updated>
    <published>2013-05-06T14:16:00-05:00</published>
    <author>
        <name>w-nws.webmaster@noaa.gov</name>
    </author>
    <title>Air Quality Alert issued May 06 at 2:16PM CDT by NWS</title>
    <link href="http://alerts.weather.gov/cap/wwacapget.php?x=TX124EFFABB2F0.AirQualityAlert.124EFFC750DCTX.HGXAQAHGX.7f2cf548a67d403f0541492b2804d621"/>
    <summary>...OZONE ACTION DAY FOR TUESDAY... THE TEXAS COMMISSION ON ENVIRONMENTAL QUALITY (TCEQ)...HAS ISSUED AN OZONE ACTION DAY FOR THE HOUSTON...GALVESTON...AND BRAZORIA AREAS FOR TUESDAY...MAY 7 2013. ATMOSPHERIC CONDITIONS ARE EXPECTED TO BE FAVORABLE FOR PRODUCING HIGH LEVELS OF OZONE POLLUTION IN THE HOUSTON...GALVESTON AND</summary>
    <cap:event>Air Quality Alert</cap:event>
    <cap:effective>2013-05-06T14:16:00-05:00</cap:effective>
    <cap:expires>2013-05-07T19:15:00-05:00</cap:expires>
    <cap:status>Actual</cap:status>
    <cap:msgType>Alert</cap:msgType>
    <cap:category>Met</cap:category>
    <cap:urgency>Unknown</cap:urgency>
    <cap:severity>Unknown</cap:severity>
    <cap:certainty>Unknown</cap:certainty>
    <cap:areaDesc>Brazoria; Galveston; Harris</cap:areaDesc>
    <cap:polygon></cap:polygon>
    <cap:geocode>
        <valueName>FIPS6</valueName>
        <value>048039 048167 048201</value>
        <valueName>UGC</valueName>
        <value>TXZ213 TXZ237 TXZ238</value>
    </cap:geocode>
    <cap:parameter>
        <valueName>VTEC</valueName>
        <value></value>
    </cap:parameter>
</entry>
</feed>
XML;

$sxe       = new SimpleXMLElement($xml);
$capFields = $sxe->entry->children('cap', true);

echo "Event: " . (string) $capFields->event . "\n";
echo "Effective: " . (string) $capFields->effective . "\n";
echo "Expires: " . (string) $capFields->expires . "\n";
echo "Severity: " . (string) $capFields->severity . "\n";
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输出：

Event: Fire Weather Watch
Effective: 2013-05-06T23:14:00-05:00
Expires: 2013-05-08T22:00:00-05:00
Severity: Moderate
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