在PHP中从对象数组中提取数据

Question

我有以下数组，无法弄清楚如何获取数据：

Array ( 
   [0] => stdClass Object ( 
      [address_components] => Array ( 
         [0] => stdClass Object ( 
            [long_name] => 180 
            [short_name] => 180 
            [types] => Array ( [0] => street_number ) 
         ) 
         [1] => stdClass Object ( 
            [long_name] => Campus Dr 
            [short_name] => Campus Dr 
            [types] => Array ( [0] => route ) 
         ) 
         [2] => stdClass Object ( 
            [long_name] => Arcadia 
            [short_name] => Arcadia 
            [types] => Array ( 
               [0] => locality 
               [1] => political 
            ) 
         ) 
         [3] => stdClass Object ( 
            [long_name] => Los Angeles 
            [short_name] => Los Angeles 
            [types] => Array ( 
               [0] => administrative_area_level_2 
               [1] => political 
            )
         ) 
         [4] => stdClass Object ( 
            [long_name] => California 
            [short_name] => CA 
            [types] => Array ( 
               [0] => administrative_area_level_1 
               [1] => political 
            ) 
         ) 
         [5] => stdClass Object ( 
            [long_name] => United States 
            [short_name] => US 
            [types] => Array ( 
               [0] => country 
               [1] => political 
            ) 
         ) 
         [6] => stdClass Object ( 
            [long_name] => 91007 
            [short_name] => 91007 
            [types] => Array ( [0] => postal_code ) 
         ) 
      ) 
      [formatted_address] => 180 Campus Dr, Arcadia, CA 91007, USA 
      [geometry] => stdClass Object ( 
         [location] => stdClass Object ( 
            [lat] => 34.1301857 
            [lng] => -118.0333596 
         ) 
         [location_type] => ROOFTOP 
         [viewport] => stdClass Object ( 
            [northeast] => stdClass Object ( 
               [lat] => 34.131534680292 
               [lng] => -118.03201061971 
            ) 
            [southwest] => stdClass Object ( 
               [lat] => 34.128836719709 
               [lng] => -118.03470858029 
            ) 
         ) 
      ) 
      [partial_match] => 1 
      [types] => Array ( [0] => street_address ) 
   ) 
) 

这存储在名为$results

的变量中

编辑： 虽然这已经得到了回答，（谢谢），这就是我的尝试：

foreach($results as $key=>$value){
    echo $key.' : '.$value.'<br />';
}

它抛出了一个错误：Object of class stdClass could not be converted to string

我知道我正在错误地访问它，但是我不记得我做错了什么。

Answer 1

echo $results[0]->address_components[0]->long_name;

Answer 2

foreach( $results[0]->address_components as $id => $address )
{
   echo "\n$id. address: {$address->long_name}\n";
   foreach ( $address->types as $type )
   {
      echo $type , ' ';
   }
}
echo $results[0]->geometry->viewport->southwest->lat;

并且，如果它是从json_decode()获得的，那么您应该注意该函数的第二个参数。如果true，它将创建您的旧数组。