[英]Unable to connect to database using PDO
I am new in PHP programming trying to connect to database using PDO. 我是PHP编程的新手,试图使用PDO连接到数据库。 But while doing getting error as:
但是在出现以下错误时:
"Class 'DB' not found in D:\\xampp\\htdocs\\web\\oop\\index.php on line 5"
“在第5行的D:\\ xampp \\ htdocs \\ web \\ oop \\ index.php中找不到类'DB'”
please help." details are given blow. thanks in advance. 请帮助。”细节一击而过。在此先感谢。
config.php 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 核心/ 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 类/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::$_instance;
}
}
?>
index.php index.php
<?php
require_once 'core/init.php';
DB::getInstance();
?>
It seems like your paths for autoloading your classes is wrong, please try the following: 自动加载类的路径似乎不正确,请尝试以下操作:
spl_autoload_register(function($class)
{
require_once '/../classes/' . $class . '.php';
}
)
or please use an absolute path when requiring files, this will always ensure that your files will load. 或在需要文件时使用绝对路径,这将始终确保文件将被加载。
spl_autoload_register(function($class)
{
require_once __DIR__ .'/classes/' . $class . '.php';
}
)
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.