PHP解析WFS XML回覆

Question

我試圖解析從WFS請求到GeoServer的XML（或GML）回覆。

我的目標是把XML提取到一個不錯的整齊排列，我可以再顯示，出口，等等等等

我的XML看起來是這樣的：

<?xml version="1.0" encoding="UTF-8"?> 
<wfs:FeatureCollection numberOfFeatures="52" timeStamp="2012-06-28T10:11:02.193Z" xsi:schemaLocation="http://squirrel.bis.local/bis_workspace http://squirrel.bis.local:8080/geoserver/wfs?service=WFS&amp;version=1.1.0&amp;request=DescribeFeatureType&amp;typeName=bis_workspace%3Abis_1_priority_species http://www.opengis.net/wfs http://squirrel.bis.local:8080/geoserver/schemas/wfs/1.1.0/wfs.xsd" xmlns:opengeo="http://opengeo.org" xmlns:ogc="http://www.opengis.net/ogc" xmlns:bis_workspace="http://squirrel.bis.local/bis_workspace" xmlns:world="http://world.opengeo.org" xmlns:wfs="http://www.opengis.net/wfs" xmlns:medford="http://medford.opengeo.org" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ows="http://www.opengis.net/ows" xmlns:gml="http://www.opengis.net/gml" xmlns:usa="http://usa.opengeo.org" xmlns:xlink="http://www.w3.org/1999/xlink"> 
<gml:featureMembers> 
<bis_workspace:bis_1_priority_species gml:id="bis_1_priority_species.fid--2f086452_138094a10a0_116d"> 

<bis_workspace:id>27407951</bis_workspace:id> 
<bis_workspace:gridref>SN123456</bis_workspace:gridref> 
<bis_workspace:species>Milvus milvus</bis_workspace:species> 
<bis_workspace:common>Red Kite</bis_workspace:common> 
<bis_workspace:date>2004</bis_workspace:date> 
<bis_workspace:comments> 
</bis_workspace:comments> 
<bis_workspace:family>Accipitridae</bis_workspace:family> 
</bis_workspace:bis_1_priority_species> 

<bis_workspace:bis_1_priority_species gml:id="bis_1_priority_species.fid--2f086452_138094a10a0_116e"> 
<bis_workspace:id>28064165</bis_workspace:id> 
<bis_workspace:gridref>SN123456</bis_workspace:gridref> 
<bis_workspace:species>Lutra lutra</bis_workspace:species> 
<bis_workspace:common>European Otter</bis_workspace:common> 
<bis_workspace:date>09/11/2001</bis_workspace:date> 
<bis_workspace:comments>spraint</bis_workspace:comments> 
<bis_workspace:family>Mustelidae</bis_workspace:family> 
</bis_workspace:bis_1_priority_species> 

</gml:featureMembers> 
</wfs:FeatureCollection> 

我想結束結果是這樣的：

Array 
(
    [0] => Array 
    (
      [id] => 27407951 
      [gridref] => SN123456 
      [species] => Milvus milvus 
      [common] => Red Kite 
      [date] => 2004 
      [comments] => 
      [family] => Accipitridae 
     ) 

[1] => Array 
    (
     [id] => 28064165 
     [gridref] => SN123456 
     [species] => Lutra lutra 
     [common] => European Otter 
     [date] => 09/11/2001 
     [comments] => spraint 
     [family] => Mustelidae 
    ) 

[2] => Array 
    (
     [id] => 27516850 
     [gridref] => SN123456 
     [species] => Tyto alba 
     [common] => Barn Owl 
     [date] => 2004 
     [comments] => Pair, nest box in tree, 2 chicks 
     [family] => Tytonidae 
    ) 

）

等等等等

我正在使用下面的代碼 - 這確實有效 - 但它似乎愚蠢低效。對於XML中的每個記錄，代碼都必須解析整個XML回覆。如果只有20-30條記錄，這很好，但是這個XML回覆可能包含數千條記錄。

有沒有一種方法只用1次掃描XML文件就可以構建這個數組？

這裏的PHP：

//Parse the XML 
    $xml = simplexml_load_string($wfs_reply, NULL, NULL, "http://squirrel.bis.local/bis_workspace"); 
    $xml->registerXPathNamespace('wfs', 'http://www.opengis.net/wfs'); 
    $xml->registerXPathNamespace('gml', 'http://www.opengis.net/gml'); 
    $xml->registerXPathNamespace('bis_workspace', 'http://squirrel.bis.local/bis_workspace'); 

    $count = 0; 
    $feature_members_array = array(); 
    $feature_members_layer_path = "//bis_workspace:" . $layer_name; //I.e. '//bis_workspace:bis_1_priority_species' 
    foreach($xml->xpath($feature_members_layer_path) as $feature_members_raw) 
    { 

     $feature_member_id = $feature_members_raw->xpath('//bis_workspace:id'); 
      $feature_members_array[$count]['id'] = (string)$feature_member_id[$count]; 
     $feature_member_gridref = $feature_members_raw->xpath('//bis_workspace:gridref'); 
      $feature_members_array[$count]['gridref'] = (string)$feature_member_gridref[$count]; 
     $feature_member_species = $feature_members_raw->xpath('//bis_workspace:species'); 
      $feature_members_array[$count]['species'] = (string)$feature_member_species[$count]; 
     $feature_member_common = $feature_members_raw->xpath('//bis_workspace:common'); 
      $feature_members_array[$count]['common'] = (string)$feature_member_common[$count]; 
     $feature_member_date = $feature_members_raw->xpath('//bis_workspace:date'); 
      $feature_members_array[$count]['date'] = (string)$feature_member_date[$count]; 
     $feature_member_comments = $feature_members_raw->xpath('//bis_workspace:comments'); 
      $feature_members_array[$count]['comments'] = (string)$feature_member_comments[$count]; 
     $feature_member_family = $feature_members_raw->xpath('//bis_workspace:family'); 
      $feature_members_array[$count]['family'] = (string)$feature_member_family[$count]; 

     $count ++; 
    } 

非常感謝， 史蒂夫

Answer 1

我也一直在努力應對WFS XML命名空間。我的解決方案是切換到JSON！

如果你的WFS支持，您可以添加到outputFormat=json WFS請求和事情變得輕鬆了許多:)