如何发布到Instagram API？

Question

尝试在instagram上返回API curl的JSON解码，但仅返回空白页。

<?php
$instagram_username = "devrXXXXXX";
$instagram_client_id = 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX';
$instagram_client_secret = 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX';
$instagram_redirect_uri = 'http://production.devr.me/XXXXXXXXX/index.php';
$url = "https://api.instagram.com/oauth/access_token";
$access_token_parameters = array(
    'client_id'     =>     $instagram_client_id,
    'client_secret'     =>     $instagram_client_secret,
    'grant_type'        =>     'authorization_code',
    'redirect_uri'      =>     $instagram_redirect_uri,
    'code'          =>     $_GET["code"]
);
$curl = curl_init($url);
curl_setopt($curl,CURLOPT_POST,true);
curl_setopt($curl,CURLOPT_POSTFIELDS,$access_token_parameters);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
$instagram_json = curl_exec($curl);

$instagram_string = json_decode($instagram_json);
echo $instagram_string;
?>

Answer 1

这可能至少会产生警告，即使不是错误，例如：

Warning Object of class stdClass could not be converted to string.

尝试：

var_dump($instagram_string);

代替：

echo $instagram_string;

如果要回显字符串，则：

echo $instagram_json;