如何设置mysql数据库连接名

Question

I'm trying to figure out how can I put two differents MYSQL database connections name on the same page, one is for local PC and one is for hosting server.

Does is possible to have two different databases servers name on the same page so that way not to change connection database name in a script before upload.

I have code like this for local PC

<?php
$username = "your_name";
$password = "your_password";
$hostname = "localhost"; 

//connection to the database
$dbhandle = mysql_connect($hostname, $username, $password) 
  or die("Unable to connect to MySQL");
echo "Connected to MySQL<br>";
?>

Can can i add another connection name in the server in same page without changing the connection database!

alidad

Answer 1

Yes, a single page may query as many different servers as needed:

<?php
$server1 = new mysqli("server1.example.com", "user1", "password1", "database1");    
$server2 = new mysqli("server2.example.com", "user2", "password2", "database2");

$result = $server1->query("SELECT 'Hello user' AS _message FROM DUAL");
$row = $result->fetch_assoc();
echo htmlentities($row['_message']);

$result = $server2->query("SELECT 'Hello user' AS _message FROM DUAL");
$row = $result->fetch_assoc();
echo htmlentities($row['_message']);

Answer 2

The way is to have a config.ini file in your localhost, and a different one in your production environment. This way you will parse this file and get your credentials.

A better way to do that is using this library: https://github.com/vlucas/phpdotenv

It works basically on the same way, but is easy to maintain.