XML到PHP不顯示數組

Question

我需要顯示來自文件XML（https://pogoda.yandex.ru/static/cities.xml）的數據的數組PHP。我想排列所有「ID」。幫我找到錯誤。由於

<?php 
$data_file_city="https://pogoda.yandex.ru/static/cities.xml"; 
$xml_city = simplexml_load_file($data_file_city); 

    foreach($xml_city->country as $key=>$value){ 
    foreach ($value->city as $key1=>$value1) { 
     $id = array("$value1[country]"); 
     echo $id; 
    } 
    } 

Answer 1

每$value1你foreach是SimpleXMLElement對象與屬性。

爲了得到這樣的對象的屬性使用attributes功能：

$ids = array(); 
$countries = array(); 
foreach($xml_city->country as $key=>$value){ 
    foreach ($value->city as $key1=>$value1) { 
     $attrs = $value1->attributes(); 

     // Use `strval` function to cast attribute value to `string` type 

     // get `id` attribute 
     $id = strval($attrs['id']); 

     // get `country` attribute 
     $country = strval($attrs['country']); 

     echo $id, '<br />', $country; 

     // add to array 
     $ids[] = $id; 
     $countries[] = $country; 
    } 
}