PHP - 博客API json解码中的特殊字符

Question

我从博客中获取所有帖子数据，但是当我输出数据时，有些特殊字符没有显示json_decode。我还尝试了 json_encode（$ resp，JSON_UNESCAPED_UNICODE）。但它仍然无效，我将如何转换它们？请参阅下面的输出

<?php
$blogId = '123';
$appId = 'abc';
$url = "https://www.googleapis.com/blogger/v3/blogs/{$blogId}/posts?key=
{$appId}";
try{
 $ch = curl_init($url);
 curl_setopt($ch, CURLOPT_HTTPGET, 1);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 $resp = curl_exec($ch);
 curl_close($ch);
 $posts = json_decode($resp, true);

 $allposts = array();
 echo "<pre>";
 foreach ($posts['items'] as $post) {
   array_push($allposts, array(
    "title" => $post['title'],
    "published" => $post['published'],
    "updated" => $post['updated'],
    "labels" => $post['labels'][0]
    ));
  }
 print_r($allposts);
 echo "</pre>";
}catch(Exception $ex){
 echo $ex->getMessage();
}
?>

输出

[title] => Notes of Class 9th: Ch 3 परमाणॠà¤à¤µà¤‚ अणॠविजà¥à¤žà¤¾à¤¨