我正在使用英国气象局的api来使用一些天气信息。XML的布局如下：
<SiteRep>
<Wx>
<Param name="F" units="C">Feels Like Temperature</Param>
<Param name="G" units="mph">Wind Gust</Param>
<Param name="H" units="%">Screen Relative Humidity</Param>
<Param name="T" units="C">Temperature</Param>
<Param name="V" units="">Visibility</Param>
<Param name="D" units="compass">Wind Direction</Param>
<Param name="S" units="mph">Wind Speed</Param>
<Param name="U" units="">Max UV Index</Param>
<Param name="W" units="">Weather Type</Param>
<Param name="Pp" units="%">Precipitation Probability</Param>
</Wx>
<DV dataDate="2013-08-28T08:00:00Z" type="Forecast">
<Location i="22" lat="53.5797" lon="-0.3472" name="HUMBERSIDE AIRPORT" country="ENGLAND" continent="EUROPE">
<Period type="Day" value="2013-08-28Z">
<Rep D="SSW" F="19" G="9" H="59" Pp="0" S="4" T="20" V="VG" W="3" U="3">720</Rep>
</Period>
</Location>
<Location i="25" lat="53.8658" lon="-1.6606" name="LEEDS BRADFORD INTERNATIONAL AIRPORT" country="ENGLAND" continent="EUROPE">
<Period type="Day" value="2013-08-28Z">
<Rep D="SW" F="17" G="11" H="72" Pp="7" S="7" T="18" V="GO" W="7" U="3">720</Rep>
</Period>
</Location>
</DV>
</SiteRep>
如果我使用simplexml_load_file和print_r加载这个XML提要，我会得到以下输出：
[Wx] => SimpleXMLElement Object
(
[Param] => Array
(
[0] => Feels Like Temperature
[1] => Wind Gust
[2] => Screen Relative Humidity
[3] => Temperature
[4] => Visibility
[5] => Wind Direction
[6] => Wind Speed
[7] => Max UV Index
[8] => Weather Type
[9] => Precipitation Probability
)
)
[DV] => SimpleXMLElement Object
(
[@attributes] => Array
(
[dataDate] => 2013-08-28T08:00:00Z
[type] => Forecast
)
[Location] => Array
(
[0] => SimpleXMLElement Object
(
[@attributes] => Array
(
[i] => 22
[lat] => 53.5797
[lon] => -0.3472
[name] => HUMBERSIDE AIRPORT
[country] => ENGLAND
[continent] => EUROPE
)
[Period] => SimpleXMLElement Object
(
[@attributes] => Array
(
[type] => Day
[value] => 2013-08-28Z
)
[Rep] => 720
)
)
[1] => SimpleXMLElement Object
(
[@attributes] => Array
(
[i] => 25
[lat] => 53.8658
[lon] => -1.6606
[name] => LEEDS BRADFORD INTERNATIONAL AIRPORT
[country] => ENGLAND
[continent] => EUROPE
)
[Period] => SimpleXMLElement Object
(
[@attributes] => Array
(
[type] => Day
[value] => 2013-08-28Z
)
[Rep] => 720
)
)
我的问题是，我想要的重要数据在Rep中，但在使用simplexml时似乎无法处理它？我应该换一种方式吗？还是我错过了什么？
试试这个来获得Rep
$xml = simplexml_load_file('file.xml');
foreach($xml->DV->Location as $location)
{
$att = $location->Period->Rep->attributes();
echo $att['D'];
echo $att['F'];
echo $att['G'];
echo $att['H'];
etc...
}
更正XML后，我建议使用DOMDocument和DOMXPath，如下所示：
<?php
$xml = <<<EOF
<SiteRep>
<Wx>
<Param name="F" units="C">Feels Like Temperature</Param>
<Param name="G" units="mph">Wind Gust</Param>
<Param name="H" units="%">Screen Relative Humidity</Param>
<Param name="T" units="C">Temperature</Param>
<Param name="V" units="">Visibility</Param>
<Param name="D" units="compass">Wind Direction</Param>
<Param name="S" units="mph">Wind Speed</Param>
<Param name="U" units="">Max UV Index</Param>
<Param name="W" units="">Weather Type</Param>
<Param name="Pp" units="%">Precipitation Probability</Param>
</Wx>
<DV dataDate="2013-08-28T08:00:00Z" type="Forecast">
<Location i="22" lat="53.5797" lon="-0.3472" name="HUMBERSIDE AIRPORT" country="ENGLAND" continent="EUROPE">
<Period type="Day" value="2013-08-28Z">
<Rep D="SSW" F="19" G="9" H="59" Pp="0" S="4" T="20" V="VG" W="3" U="3">720</Rep>
</Period>
</Location>
<Location i="25" lat="53.8658" lon="-1.6606" name="LEEDS BRADFORD INTERNATIONAL AIRPORT" country="ENGLAND" continent="EUROPE">
<Period type="Day" value="2013-08-28Z">
<Rep D="SW" F="17" G="11" H="72" Pp="7" S="7" T="18" V="GO" W="7" U="3">720</Rep>
</Period>
</Location>
</DV>
</SiteRep>
EOF;
$doc = new DOMDocument();
$doc->loadXML($xml);
$xpath = new DOMXPath($doc);
$query = '//SiteRep/DV/Location/Period/Rep';
$entries = $xpath->query($query);
foreach ($entries as $entry) {
var_dump($entry->nodeValue);
}
如果您需要属性，请查看DOMNode