如何遍歷SimpleXMLElement對象的XML值

Question

我有一個XML流解析爲SimpleXMLElement對象，我嘗試遍歷可用記錄以用作PHP頁面中的值。

[列表]的父節點當前存在兩次，因爲測試XML中有兩條記錄（列表[0]和列表[1]） 但我無法讓它像「Basic SimpleXML使用」從PHP手冊

<?php 
    $xml = simplexml_load_file('http://feed.postlets.com/Burndog/6458ec1af54f632'); 

這個工程提供首批上市的標題元素值：

$value1 = $xml->listing[0]->title; 
    echo ' here:' . $value1; 

這無法通過可用值迭代：

從print_r的

foreach ($xml->listing->title as $title) { 
    echo $title; 
    } 
    ?> 

值：

SimpleXMLElement Object 
(
[listing] => Array 
    (
     [0] => SimpleXMLElement Object 
      (
       [url] => http://www.postlets.com/repb/6509636 
       [title] => 3BR/2BA Manufactured - Beaumont 
       [subtitle] => SimpleXMLElement Object 
        (
        ) 

       [description] => SimpleXMLElement Object 
        (
        ) 

       [location] => SimpleXMLElement Object 
        (
         [street] => 1415 E 6th St 
         [city] => Beaumont 
         [zipcode] => 92223 
         [state] => CA 
         [latitude] => 33.928326 
         [longitude] => -116.959923 
         [walkscore] => 46 
        ) 

       [details] => SimpleXMLElement Object 
        (
         [money] => SimpleXMLElement Object 
          (
           [price] => 44900 
          ) 

         [property_for] => Sale 
         [property_use] => Residential 
         [property_type] => Manufactured 
         [year_built] => 2011 
         [bedrooms] => 3 
         [full_bathrooms] => 2 
         [partial_bathrooms] => 0 
         [sqft] => 1041 
         [lot_size] => 1045 sqft 
         [parking] => SimpleXMLElement Object 
          (
          ) 

        ) 

       [photos] => SimpleXMLElement Object 
        (
         [photo_1] => http://www.postlets.com/create/photos/20111101/082821_6509636_158803034.jpg 
         [photo_caption_1] => Photo 1 
         [photo_2] => http://www.postlets.com/create/photos/20111101/082822_6509636_3416721218.jpg 
         [photo_caption_2] => Photo 2 
         [photo_3] => http://www.postlets.com/create/photos/20111101/082822_6509636_1298858591.jpg 
         [photo_caption_3] => Photo 3 
        ) 

       [contact] => SimpleXMLElement Object 
        (

        ) 

      ) 

     [1] => SimpleXMLElement Object 
      (
       [url] => http://www.postlets.com/repb/7066849 
       [title] => 2BR/1+1BA Manufactured - Beaumont 
       [subtitle] => SimpleXMLElement Object 
        (
        ) 

       [description] => SimpleXMLElement Object 
        (
        ) 

       [location] => SimpleXMLElement Object 
        (
         [street] => 1415 E 6th St # 12 
         [city] => Beaumont 
         [zipcode] => 92223 
         [state] => CA 
         [latitude] => 33.929199 
         [longitude] => -116.959831 
         [walkscore] => 46 
        ) 

       [details] => SimpleXMLElement Object 
        (
         [money] => SimpleXMLElement Object 
          (
           [price] => 56000 
           [hoa] => 400 
          ) 

         [property_for] => Sale 
         [property_use] => Residential 
         [property_type] => Manufactured 
         [year_built] => 1997 
         [bedrooms] => 2 
         [full_bathrooms] => 1 
         [partial_bathrooms] => 1 
         [sqft] => 1250 
         [lot_size] => 3000 sqft 
         [property_features] => Central A/C, Dining room, Breakfast nook, Dryer 
         [community_features] => Covered parking 
         [parking] => SimpleXMLElement Object 
          (
          ) 

        ) etc etc 

那麼怎麼做才能遍歷用於圖片的元素，有不止一個？ 謝謝！

Answer 1

正如你可以在你的print_r輸出中看到的那樣，XML-Object的'listing'字段是數組，而不是標題。所以，你必須做的是通過迭代列表並打印出每個列表標題：

foreach ($xml->listing as $listing) 
{ 
    echo $listing->title; 
} 

要打印出來的圖片你會做這樣的事情：

foreach ($xml->listing as $listing) 
{ 
    echo "Title: " . $listing->title . "<br>"; 

    foreach ($listing->photos->children() as $child) 
    { 
     echo $child . "<br>"; 
    } 
}