Question

我有一个MySQL数据库，我试图弄清楚如何使用php文件访问它。我一直收到错误，所以我想知道是不是因为我的主机名不正确。如果是这样，任何人都可以帮助我确切地确定它是什么？该数据库托管在本网站上：https://christopherliao2002.000webhostapp.com/。

以下是我的HTML代码。

    <?php
    //Step1
    $db = mysqli_connect('localhost','***********','password','******')
    or die('Error connecting to MySQL server.');    
    ?>

<html>
 <head>
 </head>
 <body>
 <h1>PHP connect to MySQL</h1>
<?php
//Variables
    $servername = "localhost";
    $username = "*****";
    $password = "****";
    $dbname = "******";

    //Connection to database
    $conn = new mysqli($servername, $username, $password, $dbname);

    //Test connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
echo "Connected successfully";


</body>
</html>

Answer 1

尝试不使用try / catch：

    //Variables
    $servername = "localhost";
    $username = "username";
    $password = "password";
    $dbname = "database_name";

    //Connection to database
    $conn = new mysqli($servername, $username, $password, $dbname);

    //Test connection
    if (!$conn) {
        die("Connection failed: " . mysqli_connect_error());}

参考：https://www.w3schools.com/php/php_mysql_connect.asp

Answer 2

试试这种格式

$servername = "localhost"; // This is fixed for 000webhost.
$username = "id***_name";
$password = "****";
$dbname = "id***_name";

Answer 3

问题在于您的主机名。通常主机名为'localhost'，在000webhost中，主机名类似于mysql＃.wewewehost.com，'＃'需要替换为您需要检查主机提供商成员区域的号码。

请不要公开发布您的用户名和密码

$db = mysqli_connect('mysql#.000webhost.com','xxxxx','password','xxxxxx')
or die('Error connecting to MySQL server.');    
?>

使用php文件访问MySQL数据库

3 个答案: