PHP中的XML不显示数组

Question

I need to display an array PHP of data from file XML (https://pogoda.yandex.ru/static/cities.xml). I want in array all "id". Help me find the error. Thanks

<?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

Every $value1 in your foreach is a SimpleXMLElement Object with attributes.

To get attributes of such object use attributes function:

$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;
    }
}