connection

CodeIgniter: Unable to connect to your database server using the provided settings Error Message

I think, there is something wrong with PHP configration. First, debug your database connection using this script at the end of ./config/database.php : … … … echo ‘<pre>’; print_r($db[‘default’]); echo ‘</pre>’; echo ‘Connecting to database: ‘ .$db[‘default’][‘database’]; $dbh=mysql_connect ( $db[‘default’][‘hostname’], $db[‘default’][‘username’], $db[‘default’][‘password’]) or die(‘Cannot connect to the database because: ‘ . mysql_error()); mysql_select_db ($db[‘default’][‘database’]); echo … Read more

How do multiple clients connect simultaneously to one port, say 80, on a server? [duplicate]

First off, a “port” is just a number. All a “connection to a port” really represents is a packet which has that number specified in its “destination port” header field. Now, there are two answers to your question, one for stateful protocols and one for stateless protocols. For a stateless protocol (ie UDP), there is … Read more

How to grant remote access permissions to mysql server for user?

This grants root access with the same password from any machine in *.example.com: GRANT ALL PRIVILEGES ON *.* TO ‘root’@’%.example.com’ IDENTIFIED BY ‘some_characters’ WITH GRANT OPTION; FLUSH PRIVILEGES; If name resolution is not going to work, you may also grant access by IP or subnet: GRANT ALL PRIVILEGES ON *.* TO ‘root’@’192.168.1.%’     IDENTIFIED … Read more

Draw a connecting line between two elements [closed]

jsPlumb is an option available that supports drag and drop, as seen by its numerous demos, including the Flowchart demo. It is available in a free Community edition and a paid Toolkit edition. The Toolkit edition wraps the Community edition with a comprehensive data binding layer, as well as several UI widgets for building applications … Read more

C# Data Connections Best Practice?

Connections are pooled by .NET, so re-creating them generally isn’t an expensive operation. Keeping connections open for long periods of time, however, can cause issues. Most “best practices” tell us to open connections as late as possible (right before executing any SQL) and closing them as soon as possible (right after the last bit of … Read more

Is it safe to use a static java.sql.Connection instance in a multithreaded system?

is my use in static Connection object thread safe? Absolutely not! This way the connection going to be shared among all requests sent by all users and thus all queries will interfere with each other. But threadsafety is not your only problem, resource leaking is also your other problem. You’re keeping a single connection open … Read more