mysqli::real_connect(): (HY000/2002): Connection r

问题:

I create a web site using PHP, Mysql, and Codeignater version 3. Then host it on iPage. When I upload on live I make changes in config file.

$db['default'] = array(
    'dsn'   => '',
    'hostname' => '66.96.147.118',
    'username' => 'bit_root',
    'password' => 'root',
    'database' => 'bit_shilp',
    'dbdriver' => 'mysqli',
    'dbprefix' => '',
    'pconnect' => FALSE,
    'db_debug' => (ENVIRONMENT !== 'production'),
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
    'swap_pre' => '',
    'encrypt' => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE
);

I use codeignater version 3. On local it work great. But on live site It gives an error.

Please see this link http://bitshilp.com/BitShilp/index.php/home

It gives an error like this:

A PHP Error was encountered

Severity: Warning

Message: mysqli::real_connect(): (HY000/2002): Connection refused

Filename: mysqli/mysqli_driver.php

Line Number: 161

Backtrace:

File: /hermes/bosnaweb13a/b2582/ipg.bitshilpcom/BitShilp/application/controllers/Home.php Line: 7 Function: __construct

File: /hermes/bosnaweb13a/b2582/ipg.bitshilpcom/BitShilp/index.php Line: 292 Function: require_once A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /hermes/bosnaweb13a/b2582/ipg.bitshilpcom/BitShilp/system/core/Exceptions.php:272)

Filename: core/Common.php

Line Number: 568

Backtrace:

File: /hermes/bosnaweb13a/b2582/ipg.bitshilpcom/BitShilp/application/controllers/Home.php Line: 7 Function: __construct

File: /hermes/bosnaweb13a/b2582/ipg.bitshilpcom/BitShilp/index.php Line: 292 Function: require_once

Thanks.

回答1:

If MySQL Server is up and running - then this looks like some transport (e.g. firewall) problem. First step is to try telnet command below - if it shows an error, then problem is not related to PHP or MySQL :

telnet 66.96.147.118 3306 

(On success it will print mysql version + some random characters)

回答2:

Facing same issue in codeigniter

$db['develop'] = array(
    'dsn'   => '',
    'hostname' => 'xxxxxxxxxxx.us-east-1.rds.amazonaws.com',
    'username' => 'xxxxxxxx',
    'password' => 'xxxxxxxx',
    'database' => 'xxxxxxx',
    'dbdriver' => 'mysqli',
    'dbprefix' => '',
    'pconnect' => FALSE,
    'db_debug' => (ENVIRONMENT !== 'production'),
    'cache_on' => FALSE,
    'cachedir' => '',
//  'char_set' => 'utf8',
//  'dbcollat' => 'utf8_general_ci',
        'char_set' => 'utf8mb4',
        'dbcollat' => 'utf8mb4_unicode_ci',
    'swap_pre' => '',
    'encrypt' => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE


Not able to connect db

A PHP Error was encountered

Severity: Warning

Message: mysqli::real_connect(): (HY000/2002): Connection timed out

Filename: mysqli/mysqli_driver.php

Line Number: 201

回答3:

Same problem occurd with me, with AWS RDS MySQL. Looked various sources, but as of this thread, almost all lack of answer. While this answer helped me, tweak in mind to update hostnames at server. Access your SSH and follow the steps:

cd /etc/
sudo nano hosts

Now, Appending here your hostnames: For example:

127.0.0.1 localhost
127.0.0.1 subdomain.domain.com [if cname redirected to endpoints]
127.0.0.1 xxxxxxxx.xxxx.xxxxx.rds.amazonaws.com [Endpoints]

and now, configuring config/database.php as follows:

$active_group = 'default';
$query_builder = TRUE;

$db['default'] = array(
    'dsn'   => '',
    'hostname' => '35.150.12.345',
    'username' => 'user-name-here',
    'password' => 'password-here',
    'database' => 'database-name-here',
    'dbdriver' => 'mysqli',
    'dbprefix' => '',
    'pconnect' => FALSE,
    'db_debug' => TRUE,
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
    'swap_pre' => '',
    'encrypt' => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE
);

where 35.150.12.345 is your IPv4 Public IP, located at ec2-dashboard > Network Interfaces > Description : RDSNetworkInterface >> IPv4 Public IP('35.150.12.345') there.

Note: Please note that only IPV4 will work at 'hostname' option. hostname, cname, domains will output database connection error.