在php中使用未定义的常量erorr

Question

当我将代码切换到另一个系统时,我收到错误(下面提到的代码),

配置:

操作系统:Windows 7 php服务器:Xampp

请帮我解决这个问题.提前致谢.

码:

<?php
class settings{
    public $theme;
    public $db_pf;

    function __construct(){
        $this->theme="default";
        $this->db_pf="task_";
        $this->paths();
        $this->abbr();
        $this->errors();

        $this->enable_db_config();
    }
    function paths(){
        define(ROOT,$_SERVER['DOCUMENT_ROOT']);
        define(BP,"/task/");
        define(ABSPATH,"/task/ta-admin/");
        define(ADMPATH,"/task/administrator/");
        define(INCLUDE_PATH,ABSPATH."includes/");
        define(MODULE_PATH,ABSPATH."modules/");
        define(CONTENT_PATH,ABSPATH."contents/");
        define(THEME_PATH,ABSPATH."templates/".$this->theme."/");
        define(STYLE_PATH,THEME_PATH."styles/");
        define(IMAGE_PATH,THEME_PATH."images/");
        define(JS_PATH,BP."assets/js/");
        define(JQ_PATH,BP."assets/jq/");
    }
    function enable_db_config(){
        include(ROOT.BP."ta-includes/class-db-config.php");
    }
    function abbr(){
        define(task_title,"Admin-Quit Tasker-");
        define(LOGIN_TITLE," Administrator Login...");
        define(SLOGAN,"Enabling Solutions to your Tasks...");
    }
    function errors(){
        define(NOTFOUND,"Page not found");
        define(GOBACK," please press ok to go back...");    
    }
}
$obj_settings=new settings();
?>

错误:

Notice: Use of undefined constant ROOT - assumed 'ROOT' in C:\xampp\htdocs\task\ta-includes\class-settings.php on line 14

Notice: Use of undefined constant BP - assumed 'BP' in C:\xampp\htdocs\task\ta-includes\class-settings.php on line 15

Notice: Use of undefined constant ABSPATH - assumed 'ABSPATH' in C:\xampp\htdocs\task\ta-includes\class-settings.php on line 16

Notice: Use of undefined constant INCLUDE_PATH - assumed 'INCLUDE_PATH' in C:\xampp\htdocs\task\ta-includes\class-settings.php on line 17

Notice: Use of undefined constant CONTENT_PATH - assumed 'CONTENT_PATH' in C:\xampp\htdocs\task\ta-includes\class-settings.php on line 18

Notice: Use of undefined constant THEME_PATH - assumed 'THEME_PATH' in C:\xampp\htdocs\task\ta-includes\class-settings.php on line 19

Notice: Use of undefined constant STYLE_PATH - assumed 'STYLE_PATH' in C:\xampp\htdocs\task\ta-includes\class-settings.php on line 20

Notice: Use of undefined constant JS_PATH - assumed 'JS_PATH' in C:\xampp\htdocs\task\ta-includes\class-settings.php on line 21

Notice: Use of undefined constant JQ_PATH - assumed 'JQ_PATH' in C:\xampp\htdocs\task\ta-includes\class-settings.php on line 22

Answer 1

你的常量需要是字符串.所以你必须用这样的引号"包装"它们:

define('ROOT',$_SERVER['DOCUMENT_ROOT']);
       ^    ^

如有疑问,请务必查看手册,在这种情况下定义()

添加:
在函数中定义常量,我发现,有点" 狡猾 ".如果你坚持不将它们移动到config最初加载的另一个(例如)文件,那么至少要将它们从类构造中取出.