douxing6532 2015-04-07 07:00
浏览 50
已采纳

无法使用PDO连接到数据库

I am new in PHP programming trying to connect to database using PDO. But while doing getting error as:

"Class 'DB' not found in D:\xampp\htdocs\web\oop\index.php on line 5"

please help." details are given blow. thanks in advance.

config.php

    <?php
    class Config{
     public static function get($path = null)
    {
    if($path){
        $config = $GLOBALS['config'];
        $path = explode('/', $path);

        foreach($path as $bit)
        {
            if(isset($config[$bit]))
            {
                $config = $config[$bit];
            }
        }
        return $config;
     }
          } 
        }
      ?>

core/init.php

     require_once 'functions/sanitize.php';

     $GLOBALS['config'] = array(
    'mysql' => array(
    'host'=> '127.0.0.1',
    'username' => 'root',
    'password' => '',
    'db' => 'oop'
    ),
'remember' => array(
    'cookie_name' => 'hash',
    'cookie_expiry' => 604800
    ),
'session' => array(
    'session_name' => 'user'
    )
  );


    spl_autoload_register(function($class)
   {

require_once 'classes/' . $class . '.php';
 }
    )


 ?>

classes/DB.php

     <?php
    namespace application\libs;
    use POD;
    class DB
    {

        private static $_instance = null;
        private $_pdo,
                $_query,
                $_error = false,
                $_results,
                $_count = 0;


        private function __construct()
        {
            try{
                $this->_pdo = new POD('mysql:host=' .
                Config::get('mysql/host') . ';dbname=' .
                 Config::get('mysql/db'), Config::get('mysql/username'),
                     Config::get('mysql/password'));
            }catch(PDOException $e){
                die($e->getMessage());

            }
        }


        public static function getInstance()
        {
            if(!isset(self::$_instance)){
                self::$_instance = new DB();
            }

            return self::$_instance;
        }


    }



    ?>

index.php

    <?php
       require_once 'core/init.php';
       DB::getInstance();
    ?>
  • 写回答

1条回答 默认 最新

  • douxiong3245 2015-04-07 07:15
    关注

    It seems like your paths for autoloading your classes is wrong, please try the following:

    spl_autoload_register(function($class)
       {
    
    require_once '/../classes/' . $class . '.php';
     }
        )
    

    or please use an absolute path when requiring files, this will always ensure that your files will load.

    spl_autoload_register(function($class)
       {
    
    require_once __DIR__ .'/classes/' . $class . '.php';
     }
        )
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

报告相同问题?

悬赏问题

  • ¥50 有数据,怎么建立模型求影响全要素生产率的因素
  • ¥50 有数据,怎么用matlab求全要素生产率
  • ¥15 TI的insta-spin例程
  • ¥15 完成下列问题完成下列问题
  • ¥15 C#算法问题, 不知道怎么处理这个数据的转换
  • ¥15 YoloV5 第三方库的版本对照问题
  • ¥15 请完成下列相关问题!
  • ¥15 drone 推送镜像时候 purge: true 推送完毕后没有删除对应的镜像,手动拷贝到服务器执行结果正确在样才能让指令自动执行成功删除对应镜像,如何解决?
  • ¥15 求daily translation(DT)偏差订正方法的代码
  • ¥15 js调用html页面需要隐藏某个按钮