PHP查询MySQL 数据库后返回中文为问号

面向对象

1 $conn = new mysqli($servername,$user,$password);
3 增加 $conn->query("set names utf8");

$pdo = new PDO("mysql:host=$servername", $username, $password); 
增加 $pdo->query("set names utf8");

面向过程

$conn = mysqli_connect($servername,$user,$password);
增加 mysqli_query($conn,"set names utf8");

 
原文链接：https://blog.csdn.net/qq_44721831/article/details/111241104