为什么json_编码/解码以这种方式配置我的数组？PHP

我试图发送一个JSON文件来做一些测试。我有一个创建多维数组的简单测试文件。以下是测试文件：

<?php
error_reporting(E_ALL);
ini_set('display_errors', '1');

$user['Mongo'] = null; 
$user['Facebook'] = 12345;
$user['Twitter'] = null;
$user['Foursquare'] = null;
$user['Google'] = null;
$user['Name'] = "Bill Gates";
$user['Sex'] = 'M';
$user['Age'] = 26;
$user['Birthday'] = "1985-08-13";
$user['Friends'][0]['Mongo'] = null;
$user['Friends'][0]['Facebook'] = 123456;
$user['Friends'][0]['Twitter'] = null;
$user['Friends'][0]['Foursquare'] = null;
$user['Friends'][0]['Google'] = null;
$user['Friends'][0]['Name'] = "John Smith";
$user['Friends'][0]['Relationship'] = "Open";
$user['Friends'][1]['Mongo'] = null;
$user['Friends'][1]['Facebook'] = 1234567;
$user['Friends'][1]['Twitter'] = null;
$user['Friends'][1]['Foursquare'] = null;
$user['Friends'][1]['Google'] = null;
$user['Friends'][1]['Name'] = "Martina McBride";
$user['Friends'][1]['Relationship'] = "Open";

$user_json = json_encode($user);

$call = curl_init('http://MY_IP_HERE/user_login.php');

curl_setopt($call, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($call, CURLOPT_POSTFIELDS, $user_json);
curl_setopt($call, CURLOPT_RETURNTRANSFER, true);
curl_setopt($call, CURLOPT_HTTPHEADER, array('Content-Type: application/json', 'Content-Length: '.strlen($user_json)));

$result = curl_exec($call);
curl_close($call);

echo $result;
?>

我的问题是，为什么我在做了json_decode（）之后不能访问这些信息

为什么它要把它解码成一个对象而不是一个数组

提前感谢您的帮助

默认情况下，PHP函数json_decode（）返回对象：

如果要使用数组，请在函数中添加布尔值“true”作为可选的第二个参数，如下所示：

$user = json_decode($rawData, true);

这将把数组返回到变量

$user

如果要继续加载对象，可以使用

$user->Mongo

而不是使用

$user['Mongo']

希望这对你有帮助，祝你好运

object(stdClass)#1 (10) 
{ 
    ["Mongo"] => NULL 
    ["Facebook"] => int(12345) 
    ["Twitter"] => NULL 
    ["Foursquare"] => NULL 
    ["Google"] => NULL 
    ["Name"] => string(15) "Bill Gates" 
    ["Sex"] => string(1) "M" 
    ["Age"] => int(26) 
    ["Birthday"] => string(10) "1985-08-13" 
    ["Friends"] => array(2) 
    { 
        [0] => object(stdClass)#2 (7) 
        { 
            ["Mongo"] => NULL 
            ["Facebook"] => int(123456)
            ["Twitter"] => NULL 
            ["Foursquare"] => NULL 
            ["Google"] => NULL 
            ["Name"] => string(10) "John Smith" 
            ["Relationship"] => string(4) "Open" 
        } 
        [1] => object(stdClass)#3 (7) 
        { 
            ["Mongo"] => NULL 
            ["Facebook"] => int(1234567) 
            ["Twitter"] => NULL 
            ["Foursquare"] => NULL 
            ["Google"] => NULL 
            ["Name"] => string(15) "Martina McBride" 
            ["Relationship"] => string(4) "Open" 
        } 
    } 
}

$thing['Key']

$user = json_decode($rawData, true);