PHP xml 与 ba.com API 合作

Question

我使用 xml 格式的 Flight Offer Market Afliates 从 ba.com API 检索数据：

$url="https://api.ba.com/rest-v1/v1/flightOfferMktAffiliates;departureDateTimeOutbound=".$Fwk->returnTrueDate($_POST['departureDate']).
                    ";locationCodeOriginOutbound=".$_POST['departureMenu'].
                    ";locationCodeDestinationOutbound=".$_POST['destination'].
                    ";departureDateTimeInbound=".$Fwk->returnTrueDate($_POST['returnDate']).
                    ";locationCodeOriginInbound=".$_POST['destination'].
                    ";locationCodeDestinationInbound=".$_POST['departureMenu'].
                    ";cabin=Economy".
                    ";ADT=".$_POST['adults'].
                    ";CHD=".$_POST['children'].
                    ";INF=0".
                    ";format=.xml";
            $response = curl_get( $url );
            $xml = simplexml_load_string( $response );

我收到这样的信息：

    <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<OTA_AirLowFareSearchRS xmlns="http://www.opentravel.org/OTA/2003/05">
    <Success xmlns:a="http://www.opentravel.org/OTA/2003/05" xmlns:ns="http://www.ba.com/wsdl/availabilitymanagerv1" xmlns:tns="http://www.ba.com/schema/availabilitymanager/tGetAvailabilityV2"/>
    <PricedItineraries>
        <PricedItinerary SequenceNumber="1">
            <AirItinerary>
                <OriginDestinationOptions>
                    <OriginDestinationOption>
                        <FlightSegment ArrivalDateTime="2015-05-15T11:05:00" DepartureDateTime="2015-05-15T08:25:00" FlightNumber="117" ResBookDesigCode="O">
                            <DepartureAirport LocationCode="LHR" Terminal="5"/>
                            <ArrivalAirport LocationCode="JFK"/>
                            <OperatingAirline CompanyShortName="British Airways"/>
                            <Equipment AirEquipType="744"/>
                            <MarketingAirline Code="BA"/>
                            <TPA_Extensions>
                                <CabinInfo CabinCode="M" CabinName="World Traveller"/>
                            </TPA_Extensions>
                        </FlightSegment>
                    </OriginDestinationOption>
                    <OriginDestinationOption>
                        <FlightSegment ArrivalDateTime="2015-06-15T19:15:00" DepartureDateTime="2015-06-15T07:15:00" FlightNumber="180" ResBookDesigCode="O">
                            <DepartureAirport LocationCode="JFK" Terminal="7"/>
                            <ArrivalAirport LocationCode="LHR"/>
                            <OperatingAirline CompanyShortName="British Airways"/>
                            <Equipment AirEquipType="744"/>
                            <MarketingAirline Code="BA"/>
                            <TPA_Extensions>
                                <CabinInfo CabinCode="M" CabinName="World Traveller"/>
                            </TPA_Extensions>
                        </FlightSegment>
                    </OriginDestinationOption>
                </OriginDestinationOptions>
            </AirItinerary>
...

这是我对上述内容的理解xml:

foreach($xml->PricedItineraries->PricedItinerary as $item)
            {
                echo "here";
            }

上面returns很多"here"条消息，意思是我可以循环。但是在用 $item 尝试了各种回显之后，我无法显示任何东西。谁能告诉我如何至少到达 DepartureAirport 并从中读取变量，例如 ArrivalDateTime 和 LocationCode。

编辑

成功了。查看答案。

Answer 1

关于问题中的 xml 代码，这个嵌套的 foreach 将创建一个 table 布局并将数据从 xml 拉入其中。

        <table>
            <tr>
                <td><label>Departure date</label></td>
                <td><label>Operator</label></td>
                <td><label>Airport</label></td>
                <td><label>Terminal</label></td>
                <td><label>Flight number</label></td>
                <td><label>Return date</label></td>
                <td><label>Operator</label></td>
                <td><label>Airport</label></td>
                <td><label>Terminal</label></td>
                <td><label>Flight number</label></td>
                <td><label>Cost<label></td>
            </tr>


        $i=0;
        $c=0;
        foreach($xml->PricedItineraries->PricedItinerary as $pricedItinerary)
        {
            echo "<tr>";
            foreach($pricedItinerary->AirItinerary->OriginDestinationOptions->OriginDestinationOption as $origin)
            {
            //each cycle through this foreach fills one half of a given row.
                echo "<td id='cell_".$i.",".$c."'>".$origin->FlightSegment->attributes()->DepartureDateTime."</td>";$c++; //Such heresy, much reference
                echo "<td id='cell_".$i.",".$c."'>".$origin->FlightSegment->OperatingAirline->attributes()->CompanyShortName."</td>";$c++;
                echo "<td id='cell_".$i.",".$c."'>".$origin->FlightSegment->DepartureAirport->attributes()->LocationCode."</td>";$c++;
                echo "<td id='cell_".$i.",".$c."'>".$origin->FlightSegment->DepartureAirport->attributes()->Terminal."</td>";$c++;
                echo "<td id='cell_".$i.",".$c."'>".$origin->FlightSegment->attributes()->FlightNumber."</td>";$c++;
            }
            echo "<td id='cell_".$i.",".$c."'>£".$pricedItinerary->AirItineraryPricingInfo->ItinTotalFare->TotalFare->attributes()->Amount."</td>";
            $c=0;//reset counter to 0 to avoid generating numbers too large
            echo "</tr>";
            $i++;
        }

在给定的 xml 中有两个 FlightSegment 数组，一个包含飞往目的地的航班，另一个包含 return 航班。要创建包含两个 FlightSegment 的一行数据，您需要在第一个将 OriginDestinationOption 作为参数的 foreach 中创建另一个。循环两次后，主 foreach 将进入另一个 PricedItinerary（如果您愿意，也可以是 SequenceNumber）。

$i和$c用于给每个生成的单元格一个唯一的id。 $i 使用外循环进行迭代，$c 使用每个 <td> 元素进行迭代，并在每行末尾重置。

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