如何将连接失败 MySQL 转发到错误页面 (500)

Question

我们制作了一个带有 InnoDB 表格的简单 php 网页，以监控 InnoDB 是否出现故障。

当 InnoDB / Mysql 宕机时，我们得到一个错误：Connection failed: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2 "No such file or directory")

但我们想将其转发到自定义错误。 Lik：InnoDB 已关闭！！！

对我们如何做到这一点有什么建议吗？

<?php
$servername = "localhost";
$username = "root";
$password = "**************";
$dbname = "innodb";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$sql = "SELECT status FROM monitoring";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // output data of each row
    while($row = $result->fetch_assoc()) {
        echo "De status van InnoDB is:  " . $row["status"]. "<br>";
    }                                                              
} else {
    echo "0 results";
}
$conn->close();
?>

Answer 1

很简单，就这样用

<?php
// Configuration of database

// Check connection
if ($conn->connect_error) {
    // die("InnoDB IS DOWN");
    // OR
    echo "<p>InnoDB IS DOWN</p>";
    exit();
}

// Rest of your code

或者您可以在 IF 条件 if ($conn->connect_error) 中包含一个 HTML 页面，例如：

// Check connection
if ($conn->connect_error) {
    include 'error_page.html';
    exit();
}

// Rest of your code

如何将连接失败 MySQL 转发到错误页面 (500)

How to forward a connection failed MySQL to a error page (500)

mysql

database

error-handling

innodb