Mysql 使用 PHP 未显示主机信息

Question

我正在学习 php/mysql 教程书。将我连接到我的 mysql 数据库的示例脚本没有显示它应该显示的内容。

有问题的行是

("Host information: %\n", mysqli_get_host_info($mysqli));

还有剩下的代码

 <?php
$mysqli=new mysqli("localhost", "root", "Im not pasting this", "or this");

if (mysqli_connect_errno()){
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
    } else {
        printf("Host information: %\n", mysqli_get_host_info());
}
?>

我刚在屏幕上看到 "Hostname: "。

Answer 1

您需要在 mysqli_get_host_info() 函数中指定您的 mysqli 对象 - http://php.net/manual/en/mysqli.get-host-info.php。试试这个代码：

     <?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

/* print host information */
printf("Host info: %s\n", $mysqli->host_info);

/* close connection */
$mysqli->close();
?>

Mysql 使用 PHP 未显示主机信息

Mysql Host information not showing using PHP

php

mysql

database-connection