php - mysql错误: mysqli_connect(): (HY000/2002): Connection refused

Question

我已经在 digital ocean 上安装了 mysql 并尝试通过 php 脚本进行连接，但出现了这个错误

mysqli_connect(): (HY000/2002): Connection refused in /var/www/waev.in/signup/ajax/send_code.php on line 9 Failed to connect to MySQL: Connection refused

可能是什么问题:

我的 php 脚本

<?php
    include '../func/sms_function.php';

    $mysql_host='{ip}';
    $mysql_user='root';
    $mysql_pass='********';
    $my_db='wesearch_waev_user';

    $con = mysqli_connect($mysql_host,$mysql_user,$mysql_pass);

    if (mysqli_connect_errno())
    {
        echo "Failed to connect to MySQL: " . mysqli_connect_error();
    }
?>

Answer 1

也许是这样

  $mysql_host="localhost";// for local server

或者

 $mysql_host="$ip";// if database is in remote and IP is stored in $ip