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我在本地主机上测试我的 Codeigniter 站点，然后在服务器上更新它。在它们之间切换涉及到很多与调整相关的问题。

所以我只想通过一个常量来配置它：MYCUSTOM_SERVER_LOCATION

然后根据我的服务器（localhost 或 myhost）的位置配置我的数据库连接和密码。唯一的问题是 database.php 在mysettings库之前运行。即使在配置文件而不是库中进行设置也会产生相同的结果。

[更新]

应用程序/配置/autoload.php：

...
$autoload['libraries'] = array('mysettings','database','session');
...

应用程序/库/mysettings.php：

<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');

define("MYCUSTOM_SERVER_LOCATION", "localhost");

class mysettings {

//////////////////////////////////////////////////
// option: localhost
// option: 000webhost
//$config["mycustom_server"]="localhost";

}

应用程序/配置/数据库.php

if(MYCUSTOM_SERVER_LOCATION=="localhost")
{
    $db['default']['hostname'] = 'localhost';
    $db['default']['username'] = '...';
    $db['default']['password'] = '...';
    $db['default']['database'] = '...';
}
else if(MYCUSTOM_SERVER_LOCATION=="myserver")
{
    $db['default']['hostname'] = '...';
    $db['default']['username'] = '...';
    $db['default']['password'] = '...';
    $db['default']['database'] = '...';
}
else
{
    echo "Unknown server.";
}

输出结果：

A PHP Error was encountered
Severity: Notice
Message: Use of undefined constant MYCUSTOM_SERVER_LOCATION - assumed 'MYCUSTOM_SERVER_LOCATION'
Filename: config/database.php
Line Number: 51


A PHP Error was encountered
Severity: Notice
Message: Use of undefined constant MYCUSTOM_SERVER_LOCATION - assumed 'MYCUSTOM_SERVER_LOCATION'
Filename: config/database.php
Line Number: 58


Unknown server.
4

1 回答 1

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您可以将$active_group变量设置为application/config/database.php

示例用法：

/* 
 The $active_group variable lets you choose which connection group to
 make active.  By default there is only one group (the 'default' group).
*/

$active_group = "development";

$db['development']['hostname'] = "localhost";
$db['development']['username'] = "us";
$db['development']['password'] = "";
$db['development']['database'] = "db1";
于 2013-06-21T12:18:44.107 回答