php调用微信用户信息接口昵称里面的emoji表情怎么存储到mysql中？

Question

如题：目前确定是将获取到的字符串转为unicode编码存储到表中，表的编码是utf-8；现在遇到的问题是：如果使用json_encode（）函数多次转义后存储到数据库中的字符串多了好几层的双引号，如果只转义一次存储到数据库中虽然没有了引号，但是 符号不见了，如下图，后面附关键代码,新手咨询存储的正确方式；

看到回答都是需要将数据库字符集改为：utf8mb4,想知道不用这个字符集用utf-8不可以吗？新手只知道在my.ini修改全局的字符集，不知道怎么针对这个字段来修改啊。

最新更新：经过测试虽然utf8mb4能够将数据存储到数据库中，但是还是有问题的：如果微信昵称前后面都有表情，中间有文字的时候，数据库中只能将前面的表情保存，后面的表情变成了空格，经过几番周折还是使用了utf8来保存下图蓝色条选中的那样字符串来保存，在前端对字符串进行去"处理，保证用户的昵称不被破坏，如果各位有更好的办法欢迎留言。

关键代码：

function weixininfo($code){
    $userinfo = getJson($get_user_info_url);
  $wxif = new wxinfo($userinfo["openid"],$userinfo["nickname"],$userinfo["sex"],$userinfo["headimgurl"]);
  class Emp {};
  $obj = new Emp();
  $obj->result = 0;
  $obj->info  = $wxif;
  return $obj;
}

$code = $_GET['code'];
$data = weixininfo($code);
$info = $data->info;
$openid = $info->openid;
$nickname = $info->nickname;
$name = json_encode($nickname);
$sex = $info->sex;
$headurl = $info->headurl;
$sqls = "INSERT INTO mytest(openid,nickname,sex,headurl) VALUES ('$openid',$name,'$sex','$headurl')";
if($conn->query($sqls) === true){
    session_start();
    $_SESSION["openid"]=$openid;
    $conn->close();
    // $uri ="./index.php";
    // header( "Location: $uri" );
}else{
    echo "失败：".$sqls."<br>".$conn->error;
};

function getJson($url){
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); 
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $output = curl_exec($ch);
    curl_close($ch);
    return json_decode($output, true);
}
class wxinfo {
  public $openid;
  public $nickname;
  public $sex;
  public $headurl;

  public function __construct($openid,$nickname,$sex,$headurl){
    $this->openid = $openid;
    $this->nickname = $nickname;
    $this->sex = $sex;
    $this->headurl = $headurl;
  }
}

Answer 1

1. mysql field set to utf8mb4-utf8mb4-general_ci

2. php

<?php
json_encode($data, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);

Answer 2

If the table supports utf8mb4, change it to utf8mb4. If it is not useful, use utf32. utf8 only supports a small number of emoji expressions

Before querying, execute $conn->query("set names utf8") to ensure that the data transmission process is not garbled

emoji are also characters, there is no need to convert them to json

Answer 3

utf-8 uses 3 bytes for storage, while emoji characters have 4 bytes, so converting utf-8 to utf8mb4 will solve it

Also note: the mysql version must be v5.5.3 or higher