如何在 CodeIgniter 2 中使用 PDO? [英] How can I use PDO in CodeIgniter 2?

问题描述

我想使用 PDO 而不是内置的数据库类.但是我该怎么做呢?我尝试进行博客文章中建议的修改.我注释掉了 systemdatabaseDB.php 的一部分并添加了:

I would like to use PDO instead of the built-in database-classes. But how can I do it? I tried to do the modifications suggested in a blog post. I commented out a part of systemdatabaseDB.php and also added:

$DB = new PDO(
$params['dbdriver'].':host='.$params['hostname'].';dbname='.$params['database'],
$params['username'], $params['password']);

return $DB;

但是现在如果我在控制器中执行 $this->load->database(); ，我的 PHP 代码会崩溃.那么我应该如何在 CodeIgniter 中使用 PDO 并使用 PDO 执行数据库查询?

But now my PHP-code crashes if I do $this->load->database(); in a Controller. So how should I use PDO and execute database queries using PDO in CodeIgniter?

我也尝试在控制器中使用此代码:

I have also tried to use this code in a Controller:

foreach($this->db->query('SELECT * FROM users') as $row) {
    print_r($row);
}

但是没有用.

推荐答案

$stmt = $this->db->prepare("SELECT * FROM users");  
$stmt->execute();  
foreach ($stmt->fetch(PDO::FETCH_ASSOC) as $row) {
      print_r($row);
}

或者:

foreach ($this->db->query("SELECT * FROM users") as $row) {  
     print_r($row)."
";
}    

在此处了解有关 3 个 PDO 数据库调用的更多信息...

Learn more about 3 PDO database calls here...

PDO 查询
PDO 执行
PDO 准备

还要检查您的 app/config/database.php 文件以进行以下设置:

Also check your app/config/database.php file for the following settings:

$active_group = 'default';  
$active_record = FALSE;  

$db['default']['hostname'] = 'YOURHOSTNAME';  
$db['default']['username'] = 'YOURUSERNAME';  
$db['default']['password'] = 'YOURPASSWORD';  
$db['default']['database'] = 'YOURDATABASE';  
$db['default']['dbdriver'] = 'mysql';  
$db['default']['dbprefix'] = '';  
$db['default']['pconnect'] = TRUE;  
$db['default']['db_debug'] = TRUE;  
$db['default']['cache_on'] = FALSE;  
$db['default']['cachedir'] = '';  
$db['default']['char_set'] = 'utf8';  
$db['default']['dbcollat'] = 'utf8_general_ci';  
$db['default']['swap_pre'] = '';  
$db['default']['autoinit'] = TRUE;  
$db['default']['stricton'] = FALSE; 

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