从其他文件中的类访问文件中的变量

Question

If I have a config.php file with variables in it like so... 如果我有一个带有变量的config.php文件，就像这样...

config.php : config.php ：

$cnf['dbhost'] = "0.0.0.0";
$cnf['dbuser'] = "mysqluser";
$cnf['dbpass'] = "mysqlpass";

How can I then access these variables from a class which is in another file, such as... 然后如何从另一个文件中的类访问这些变量，例如...

inc/db.class.php : inc / db.class.php ：

class db() {

  function connect() {
    mysql_connect($cnf['dbhost'], $cnf['dbuser'], $cnf['dbpass']);
  }

}
$db = new db();

So, I can use the class in another file such as... 因此，我可以在另一个文件中使用该类，例如...

index.php : index.php ：

<html>
  <?php
    include('config.php');
    include('inc/db.class.php');
    $db->connect();
  ?>
</html>

Answer 1

Include config file with include , require or require_once at the beginning of your db script. db脚本开头的include配置文件包括include ， require或require_once 。 You will also need to specify $cnf as global in the function you want to use, otherwise you cannot access global variables: 您还需要在要使用的函数中将$cnf指定$cnf全局变量，否则无法访问全局变量：

include "../config.php";

class db() {

  function connect() {
      global $cnf;
      mysql_connect($cnf['dbhost'], $cnf['dbuser'], $cnf['dbpass']);
  }

}
$db = new db();

EDIT : On big project I prefer to use a boot.php where I include all the php files, so I wont need to include in every file everything I need. 编辑：在大型项目上，我更喜欢使用boot.php，其中包含所有php文件，因此，我不需要在每个文件中包含我需要的所有内容。 Having this, I just need to include the boot into the index.php and have to disposition all the definitions. 有了这个，我只需要将启动包含在index.php中，并必须处理所有定义。 It's slightly slower but really comfortable. 稍微慢一点，但是真的很舒服。

Answer 2

Just include config.php in your inc/db.class.php . 只需在您的inc/db.class.php包含config.php inc/db.class.php 。

EDIT (answering the query asked in comment) 编辑（回答评论中询问的查询）

What you could do is have a init.php like the following, 您可以做的是像下面这样的init.php ，

include('config.php');
include('db.class.php');
include('file.php');

So your classes will be able to access variables from config.php . 因此，您的类将能够从config.php访问变量。 And now for your index.php you only need to include init.php and all your classes, config, etc. will be included. 现在，对于index.php您只需包含init.php ，所有类，配置等都将包括在内。

从其他文件中的类访问文件中的变量

问题描述

2 个解决方案

解决方案1
3 已采纳 2012-07-07 14:50:44

解决方案2
2 2012-07-07 14:50:59

从其他文件中的类访问文件中的变量

问题描述

2 个解决方案

解决方案1 3 已采纳 2012-07-07 14:50:44

解决方案2 2 2012-07-07 14:50:59

解决方案1
3 已采纳 2012-07-07 14:50:44

解决方案2
2 2012-07-07 14:50:59