無法使用Codeigntier連接到外部數據庫

Question

我希望Codeigntier連接到另一臺服務器（不是本地主機）上的MySQL數據庫。我如何在config/database.php文件中配置它？

我將主機名設置爲具有正確用戶名/密碼的IP地址，但它不起作用。

我得到的錯誤說：使用所提供的設置無法連接到數據庫服務器：

數據庫發生錯誤。

Answer 1

Triq，

您可以像另一組數據庫的配置添加到您的config/database.php文件（在你的default集的頂部）以下的（你可以改變dbwrite到其他你喜歡的名字）：

$dbw = $this->load->database('dbwrite',TRUE); 
$dbw->query(xxx); // this will execute the query on the other db 

：

$db['dbwrite']['hostname'] = "[other db host]"; 
$db['dbwrite']['username'] = "[other db username]"; 
$db['dbwrite']['password'] = "[other db password]"; 
$db['dbwrite']['database'] = "[other db name]"; 
$db['dbwrite']['dbdriver'] = "mysql"; 
$db['dbwrite']['dbprefix'] = ""; 
$db['dbwrite']['pconnect'] = FALSE; 
$db['dbwrite']['db_debug'] = FALSE; 
$db['dbwrite']['cache_on'] = FALSE; 
$db['dbwrite']['cachedir'] = ""; 
$db['dbwrite']['char_set'] = "utf8"; 
$db['dbwrite']['dbcollat'] = "utf8_general_ci"; 

然後，您可以使用下面的代碼完成這dB參考

確保dbwrite與您在其他數據庫配置中使用的名稱相同。 $this是指$CI實例。

Answer 2

Heru，好像你只是想將當前的數據庫配置從本地主機改爲你的活動服務器。執行此操作，在application/config文件夾中打開database.php文件。然後找到這些線。

$db['default']['hostname'] = 'localhost'; 
$db['default']['username'] = 'root'; 
$db['default']['password'] = ''; // might be empty or might be full 
$db['default']['database'] = 'your_database'; 

並將其更改爲此。 。 。

$db['default']['hostname'] = 'your_host_name'; 
$db['default']['username'] = 'your_user_name'; 
$db['default']['password'] = 'your_password'; 
$db['default']['database'] = 'your_new_database'; 

取決於您是否在共享主機上或其他因素。您的主機可能會爲您提供新的主機名，可能需要密碼並可能爲您提供預配置的數據庫名稱。查看主機提供商的這些信息。

如果不起作用。 。 。

您也可以嘗試將其更改爲可以找到您的服務器IP並將其轉換爲指定地址的數據庫，但您的數據庫可能位於或不位於不同的地址。但值得一試。

$hostIP = $_SERVER['SERVER_ADDR']; 
(string)$hostname = gethostbyaddr($hostIP); 

$db['default']['hostname'] = $hostname; 
$db['default']['username'] = 'your_user_name'; 
$db['default']['password'] = 'your_password'; 
$db['default']['database'] = 'your_new_database'; 

此外，如果你自信你的數據庫的IP，改變上述

(string)$hostname = gethostbyaddr($hostIP)

到

(string)$hostname = gethostbyaddr('10.11.12.123'); // with your IP #

Answer 3

這在我看來是一個數據庫權限的問題，而不是一個CI問題。您可能無權從您的IP連接。當你一些隨機的PHP頁面上運行此會發生什麼：

mysql_connect($server, $un, $pw) or die(mysql_error()); 

爲了解決這個問題，只需運行：

GRANT SELECT, DELETE, UPATE, INSERT ON $dbname.% TO $un@% IDENTIFIED BY ('$pw') 

Answer 4

You can easily Crated multiple database connection using codeigniter 

    $db['default']['hostname'] = "localhost:3306"; 
    $db['default']['username'] = "root"; 
    $db['default']['password'] = ""; 
    $db['default']['database'] = "buy599_erp"; 
    $db['default']['dbdriver'] = "mysql"; 
    $db['default']['dbprefix'] = ""; 
    $db['default']['pconnect'] = TRUE; 
    $db['default']['db_debug'] = TRU`enter code here`E; 
    $db['default']['cache_on'] = FALSE; 
    $db['default']['cachedir'] = ""; 
    $db['default']['char_set'] = "utf8"; 
    $db['default']['dbcollat'] = "utf8_general_ci"; 

    $db['magento6']['hostname'] = "localhost:3306"; 
    $db['magento6']['username'] = "root"; 
    $db['magento6']['password'] = ""; 
    $db['magento6']['database'] = "magento6"; 
    $db['magento6']['dbdriver'] = "mysql"; 
    $db['magento6']['dbprefix'] = ""; 
    $db['magento6']['pconnect'] = TRUE; 
    $db['magento6']['db_debug'] = TRUE; 
    $db['magento6']['cache_on'] = FALSE; 
    $db['magento6']['cachedir'] = ""; 
    $db['magento6']['char_set'] = "utf8"; 
    $db['magento6']['dbcollat'] = "utf8_general_ci"; 

    $db['magento6stalkbuylove']['hostname'] = "localhost:3306"; 
    $db['magento6stalkbuylove']['username'] = "root"; 
    $db['magento6stalkbuylove']['password'] = ""; 
    $db['magento6stalkbuylove']['database'] = "magento6stalkbuylove"; 
    $db['magento6stalkbuylove']['dbdriver'] = "mysql"; 
    $db['magento6stalkbuylove']['dbprefix'] = ""; 
    $db['magento6stalkbuylove']['pconnect'] = TRUE; 
    $db['magento6stalkbuylove']['db_debug'] = TRUE; 
    $db['magento6stalkbuylove']['cache_on'] = FALSE; 
    $db['magento6stalkbuylove']['cachedir'] = ""; 
    $db['magento6stalkbuylove']['char_set'] = "utf8"; 
    $db['magento6stalkbuylove']['dbcollat'] = "utf8_general_ci";