未定义的变量错误

Question

嗨，我是Denis，我是php的新手。我爸爸是一名PHP开发人员，但我想自己做这件事。我现在11岁了！ ：）

我为我的php做了一个安装程序，我收到了这个错误：

Notice: Undefined variable: config in \path\to\core.php on line 20

这部分失败了：

$system['home_url'] = "".$config['home']['url']."";

但如果我之前包含配置文件并且此变量未定义，它怎么会失败！

我做了：require('config.php');

config.php文件代码为：

$config['home']['url'] = "http://localhost/";

我使用变量吗？我搜索了所有互联网，我只找到使用global的解决方案，但我真的不知道它是如何工作的。

再见！并感谢:)）））

EDIT-- core.php中

<?PHP
/*=======================================================================
| #######################################################################
| This program is free software: you can redistribute it and/or modify
| it under the terms of the GNU General Public License as published by
| the Free Software Foundation, either version 3 of the License, or
| (at your option) any later version.
| #######################################################################
| This program is distributed in the hope that it will be useful,
| but WITHOUT ANY WARRANTY; without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
| GNU General Public License for more details.
\======================================================================*/
require('config.php');

$system['home_url'] = "".$config['home']['url']."";
$system['updates_enabled'] = "".$config['updates']['enabled'].""; 
$system['update_url'] = "".$config['update']['url']."";
$system['language'] = $config['language'];
$system['favicon'] = "".$config['favicon'].""; 
$system['maintenance_status'] = "".$config['maintenance']['status'].""; 
$system['version'] = "".$config['version'].""; 
$system['master_user'] = "".$config['master']['user']."";
$system['master_password'] = "".$config['master']['password']."";
$system['config_path'] = "config.php";

/*====================================================================*/

$site['name'] = "".$config['site']['name']."";
$site['desc'] = "".$config['site']['desc'].""; 

/*====================================================================*/

$cloud_panel['reload_time'] = "".$config['reload']['time']."";

/*====================================================================*/

require "".$system['home_url']."lang/lang_".$system['language'].".php";

/*====================================================================*/

$template['id'] = "".$config['template']['id']."";
$template['webgallery_type'] = "".$config['webgallery']['type']."";
$template['webgallery_url'] = "".$config['webgallery']['url'].""; 

/*====================================================================*/

if(isset($_GET['help'])) { header('Location: '.$system['home_url'].'help.php'); }

/*====================================================================*/

if ($template['webgallery_type'] == 1) { $template['my_webgallery'] = "".$system['home_url']."cdn/web-gallery"; } else { $template['my_webgallery'] = $template['webgallery_url']; }

/*====================================================================*/

?>

的config.php

<?PHP
/*=======================================================================
| #######################################################################
| This program is free software: you can redistribute it and/or modify
| it under the terms of the GNU General Public License as published by
| the Free Software Foundation, either version 3 of the License, or
| (at your option) any later version.
| #######################################################################
| This program is distributed in the hope that it will be useful,
| but WITHOUT ANY WARRANTY; without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
| GNU General Public License for more details.
\======================================================================*/

$config['site']['name'] = "heya";
$config['site']['desc'] = "heya";
$config['home']['url'] = "http://localhost/";
$config['updates']['enabled'] = "1";
$config['update']['url'] = "http://localhost/update";
$config['language'] = "es";
$config['favicon'] = "favicon.ico";
$config['maintenance']['status'] = "1";
$config['reload']['time'] = "10";
$config['version'] = "1.3.4";
$config['master']['user'] = "heya";
$config['master']['password'] = "heya";
$config['template']['id'] = "9";
$config['webgallery']['type'] = "1";
$config['webgallery']['url'] = "heya";

?>

Answer 1

在使用之前检查变量lik isset($config['home']['url'])您还可以使用!empty($config['home']['url'])