这是我正在尝试运行的脚本：
<?php
$lat = $_GET[lat];
$long = $_GET[long];
$mysongs3 = simplexml_load_file('http://local.yahooapis.com/LocalSearchService/V3/localSearch?appid=845e721464167b9976ca031b0c3c66f3cc6563ee&query=restaurant&latitude='.$lat.'&longitude='.$long.'&results=2');
$lat2 = $mysongs3->Result[0]->Latitude;
$long2 = $mysongs3->Result[0]->Longitude;
$mysongs4 = simplexml_load_file('http://www.mapquestapi.com/directions/v1/route?key=Fmjtd%7Cluuan1urn9%2Cb0%3Do5-968206&from='.$lat.', '.$long.'&to='.$lat2.', '.$long2.'&callback=renderNarrative&outFormat=xml');
echo $mysongs4->route[0]->time;
?>
它没有回应任何东西。
它正在使用MapQuest和Yahoo API（虽然我知道问题出在MapQuest API位，因为如果我删除MapQuest位并回显它，它就可以工作）。 API密钥是正确的，顺便说一句。
$ _ GET [lat]是33.8524925和 $ _GET [long]是-117.73242200000001。
答案 0 :(得分：1)
对MapquestAPI的调用会返回以下文档：
<?xml version = "1.0" encoding = "UTF-8" ?>
<response>
<info>
<statusCode>403</statusCode>
<messages>
<message/>
</messages>
<copyright>
<imageUrl>http://api.mqcdn.com/res/mqlogo.gif</imageUrl>
<imageAltText>© 2012 MapQuest, Inc.</imageAltText>
<text>© 2012 MapQuest, Inc.</text>
</copyright>
</info>
<route/>
</response>
正如您在最后看到的那样，<route />元素为空。这就是为什么
echo $mysongs4->route[0]->time;
也是空的。如果它会有所不同，那么你就会遇到真正的问题。
如果您希望有某些内容，请与API供应商联系以获取支持选项。
此外，我建议您为URL创建变量，以便调试实际请求的URL。并非您在构建URI时出错。小心。
事实证明这实际上是你的问题。您需要使用正确的URI请求API，否则它不起作用。仔细检查是否删除了lat,long对的任何空格，正确的URI必须如下所示：
http://www.mapquestapi.com/directions/v1/route?key=Fmjtd%7Cluuan1urn9%2Cb0%3Do5-968206&from=33.8524925,-117.73242200000001&to=33.863084,-117.739601&callback=renderNarrative&outFormat=xml
使用simplexml_load_file工作正常，请参阅示例：
$mapqueryUri = 'http://www.mapquestapi.com/directions/v1/route?key=Fmjtd%7Cluuan1urn9%2Cb0%3Do5-968206' .
'&from=33.8524925,-117.73242200000001&to=33.863084,-117.739601&callback=renderNarrative' .
'&outFormat=xml';
$mysongs4 = simplexml_load_file($mapqueryUri);
echo $mysongs4->asXML();
输出：
<?xml version = "1.0" encoding = "UTF-8"?>
<response>
<info>
<statusCode>0</statusCode>
<messages/>
<copyright>
<imageUrl>http://api.mqcdn.com/res/mqlogo.gif</imageUrl>
<imageAltText>© 2012 MapQuest, Inc.</imageAltText>
<text>© 2012 MapQuest, Inc.</text>
</copyright>
</info>
<route>
<sessionId>50d7729f-0223-0013-02b7-60f4-d485645ba5f2</sessionId>
<options>
<shapeFormat>raw</shapeFormat>
<generalize>-1.0</generalize>
<maxLinkId>0</maxLinkId>
<narrativeType>text</narrativeType>
<stateBoundaryDisplay>true</stateBoundaryDisplay>
<countryBoundaryDisplay>true</countryBoundaryDisplay>
<sideOfStreetDisplay>true</sideOfStreetDisplay>
<destinationManeuverDisplay>true</destinationManeuverDisplay>
<avoidTimedConditions>false</avoidTimedConditions>
<enhancedNarrative>false</enhancedNarrative>
<returnLinkDirections>false</returnLinkDirections>
<timeType>0</timeType>
<routeType>FASTEST</routeType>
<locale>en_US</locale>
<unit>M</unit>
<tryAvoidLinkIds/>
<mustAvoidLinkIds/>
<manmaps>true</manmaps>
<drivingStyle>2</drivingStyle>
<highwayEfficiency>22.0</highwayEfficiency>
<useTraffic>false</useTraffic>
</options>
<boundingBox>
<ul>
<lat>33.863009999999996</lat>
<lng>-117.741813</lng>
</ul>
<lr>
<lat>33.852661</lat>
<lng>-117.732475</lng>
</lr>
</boundingBox>
<distance>1.241</distance>
<time>272</time>
<realTime>272</realTime>
<fuelUsed>0.089725</fuelUsed>
<formattedTime>00:04:32</formattedTime>
<legs>
<leg>
<distance>1.241</distance>
<time>272</time>
<formattedTime>00:04:32</formattedTime>
<index>0</index>
<maneuvers>
<maneuver>
<startPoint>
<lat>33.8528</lat>
<lng>-117.7325</lng>
</startPoint>
<maneuverNotes/>
<distance>0.155</distance>
<time>34</time>
<formattedTime>00:00:34</formattedTime>
<attributes>0</attributes>
<turnType>6</turnType>
<direction>7</direction>
<narrative>Start out going west on E Marblehead Way toward S Hanlon Way.</narrative>
<directionName>West</directionName>
<index>0</index>
<streets>
<street>E Marblehead Way</street>
</streets>
<signs/>
<iconUrl><![CDATA[http://content.mapquest.com/mqsite/turnsigns/rs_left_sm.gif]]></iconUrl>
<linkIds/>
<mapUrl>
<![CDATA[http://www.mapquestapi.com/staticmap/v4/getmap?type=map&size=225,160&pois=purple-2,33.852756,-117.732475,0,0|purple-3,33.853279,-117.73499199999999,0,0|¢er=33.8530175,-117.7337335&zoom=13&key=Fmjtd|luuan1urn9,b0=o5-968206&rand=2931445&session=50d7729f-0223-0013-02b7-60f4-d485645ba5f2]]>
</mapUrl>
</maneuver>
<maneuver>
<startPoint>
<lat>33.8533</lat>
<lng>-117.735</lng>
</startPoint>
<maneuverNotes/>
<distance>0.521</distance>
<time>68</time>
<formattedTime>00:01:08</formattedTime>
<attributes>0</attributes>
<turnType>2</turnType>
<direction>2</direction>
<narrative>Turn right onto S Serrano Ave.</narrative>
<directionName>Northwest</directionName>
<index>1</index>
<streets>
<street>S Serrano Ave</street>
</streets>
<signs/>
<iconUrl><![CDATA[http://content.mapquest.com/mqsite/turnsigns/rs_right_sm.gif]]></iconUrl>
<linkIds/>
<mapUrl>
<![CDATA[http://www.mapquestapi.com/staticmap/v4/getmap?type=map&size=225,160&pois=purple-3,33.853279,-117.73499199999999,0,0|purple-4,33.860351,-117.737342,0,0|¢er=33.856815,-117.736167&zoom=10&key=Fmjtd|luuan1urn9,b0=o5-968206&rand=2546696&session=50d7729f-0223-0013-02b7-60f4-d485645ba5f2]]>
</mapUrl>
</maneuver>
<maneuver>
<startPoint>
<lat>33.8604</lat>
<lng>-117.7373</lng>
</startPoint>
<maneuverNotes/>
<distance>0.199</distance>
<time>49</time>
<formattedTime>00:00:49</formattedTime>
<attributes>0</attributes>
<turnType>6</turnType>
<direction>7</direction>
<narrative>Turn left onto Canyon Creek Rd.</narrative>
<directionName>West</directionName>
<index>2</index>
<streets>
<street>Canyon Creek Rd</street>
</streets>
<signs/>
<iconUrl><![CDATA[http://content.mapquest.com/mqsite/turnsigns/rs_left_sm.gif]]></iconUrl>
<linkIds/>
<mapUrl>
<![CDATA[http://www.mapquestapi.com/staticmap/v4/getmap?type=map&size=225,160&pois=purple-4,33.860351,-117.737342,0,0|purple-5,33.860008,-117.740676,0,0|¢er=33.8601795,-117.739009&zoom=13&key=Fmjtd|luuan1urn9,b0=o5-968206&rand=2546696&session=50d7729f-0223-0013-02b7-60f4-d485645ba5f2]]>
</mapUrl>
</maneuver>
<maneuver>
<startPoint>
<lat>33.86</lat>
<lng>-117.7407</lng>
</startPoint>
<maneuverNotes/>
<distance>0.163</distance>
<time>60</time>
<formattedTime>00:01:00</formattedTime>
<attributes>0</attributes>
<turnType>2</turnType>
<direction>1</direction>
<narrative>Turn right onto S Glenhurst Dr.</narrative>
<directionName>North</directionName>
<index>3</index>
<streets>
<street>S Glenhurst Dr</street>
</streets>
<signs/>
<iconUrl><![CDATA[http://content.mapquest.com/mqsite/turnsigns/rs_right_sm.gif]]></iconUrl>
<linkIds/>
<mapUrl>
<![CDATA[http://www.mapquestapi.com/staticmap/v4/getmap?type=map&size=225,160&pois=purple-5,33.860008,-117.740676,0,0|purple-6,33.862079,-117.741706,0,0|¢er=33.8610435,-117.74119099999999&zoom=12&key=Fmjtd|luuan1urn9,b0=o5-968206&rand=2546696&session=50d7729f-0223-0013-02b7-60f4-d485645ba5f2]]>
</mapUrl>
</maneuver>
<maneuver>
<startPoint>
<lat>33.8621</lat>
<lng>-117.7417</lng>
</startPoint>
<maneuverNotes/>
<distance>0.044</distance>
<time>20</time>
<formattedTime>00:00:20</formattedTime>
<attributes>0</attributes>
<turnType>2</turnType>
<direction>3</direction>
<narrative>Turn right to stay on S Glenhurst Dr.</narrative>
<directionName>Northeast</directionName>
<index>4</index>
<streets>
<street>S Glenhurst Dr</street>
</streets>
<signs/>
<iconUrl><![CDATA[http://content.mapquest.com/mqsite/turnsigns/rs_right_sm.gif]]></iconUrl>
<linkIds/>
<mapUrl>
<![CDATA[http://www.mapquestapi.com/staticmap/v4/getmap?type=map&size=225,160&pois=purple-6,33.862079,-117.741706,0,0|purple-7,33.862358,-117.74101999999999,0,0|¢er=33.8622185,-117.74136299999999&zoom=15&key=Fmjtd|luuan1urn9,b0=o5-968206&rand=2546696&session=50d7729f-0223-0013-02b7-60f4-d485645ba5f2]]>
</mapUrl>
</maneuver>
<maneuver>
<startPoint>
<lat>33.8624</lat>
<lng>-117.741</lng>
</startPoint>
<maneuverNotes/>
<distance>0.159</distance>
<time>41</time>
<formattedTime>00:00:41</formattedTime>
<attributes>0</attributes>
<turnType>2</turnType>
<direction>2</direction>
<narrative>Turn right onto E Oak Ridge Cir.</narrative>
<directionName>Northwest</directionName>
<index>5</index>
<streets>
<street>E Oak Ridge Cir</street>
</streets>
<signs/>
<iconUrl><![CDATA[http://content.mapquest.com/mqsite/turnsigns/rs_right_sm.gif]]></iconUrl>
<linkIds/>
<mapUrl>
<![CDATA[http://www.mapquestapi.com/staticmap/v4/getmap?type=map&size=225,160&pois=purple-7,33.862358,-117.74101999999999,0,0|purple-8,33.863009999999996,-117.739685,0,0|¢er=33.862684,-117.7403525&zoom=14&key=Fmjtd|luuan1urn9,b0=o5-968206&rand=2546696&session=50d7729f-0223-0013-02b7-60f4-d485645ba5f2]]>
</mapUrl>
</maneuver>
<maneuver>
<startPoint/>
<maneuverNotes/>
<distance>0.0</distance>
<time>0</time>
<formattedTime>00:00:00</formattedTime>
<attributes>0</attributes>
<turnType>-1</turnType>
<direction>0</direction>
<narrative>8175 E OAK RIDGE CIR is on the right.</narrative>
<directionName/>
<index>6</index>
<streets/>
<signs/>
<linkIds/>
<mapUrl><![CDATA[]]></mapUrl>
</maneuver>
</maneuvers>
<hasTollRoad>false</hasTollRoad>
<hasFerry>false</hasFerry>
<hasHighway>false</hasHighway>
<hasSeasonalClosure>false</hasSeasonalClosure>
<hasUnpaved>false</hasUnpaved>
<hasCountryCross>false</hasCountryCross>
</leg>
</legs>
<hasTollRoad>false</hasTollRoad>
<hasFerry>false</hasFerry>
<hasHighway>false</hasHighway>
<hasSeasonalClosure>false</hasSeasonalClosure>
<hasUnpaved>false</hasUnpaved>
<hasCountryCross>false</hasCountryCross>
<locations>
<location>
<street>8250 E Marblehead Way</street>
<adminArea5 type="City">Anaheim</adminArea5>
<adminArea3 type="State">CA</adminArea3>
<adminArea4 type="County">Orange</adminArea4>
<postalCode>92808</postalCode>
<adminArea1 type="Country">US</adminArea1>
<geocodeQuality>ADDRESS</geocodeQuality>
<geocodeQualityCode>L1AAA</geocodeQualityCode>
<dragPoint>false</dragPoint>
<sideOfStreet>L</sideOfStreet>
<displayLatLng>
<latLng>
<lat>33.852492</lat>
<lng>-117.732422</lng>
</latLng>
</displayLatLng>
<linkId>24154164</linkId>
<type>s</type>
<latLng>
<lat>33.852492</lat>
<lng>-117.732422</lng>
</latLng>
</location>
<location>
<street>8175 E Oak Ridge Cir</street>
<adminArea5 type="City">Anaheim</adminArea5>
<adminArea3 type="State">CA</adminArea3>
<adminArea4 type="County">Orange</adminArea4>
<postalCode>92808</postalCode>
<adminArea1 type="Country">US</adminArea1>
<geocodeQuality>ADDRESS</geocodeQuality>
<geocodeQualityCode>L1AAA</geocodeQualityCode>
<dragPoint>false</dragPoint>
<sideOfStreet>R</sideOfStreet>
<displayLatLng>
<latLng>
<lat>33.863084</lat>
<lng>-117.739601</lng>
</latLng>
</displayLatLng>
<linkId>24115749</linkId>
<type>s</type>
<latLng>
<lat>33.863084</lat>
<lng>-117.739601</lng>
</latLng>
</location>
</locations>
<locationSequence>0,1</locationSequence>
<computedWaypoints/>
</route>
</response>