Initial Import
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+<td><h1>Code Igniter User Guide Version 1.4.0</h1></td>

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+<h1>Database Configuration</h1>

+

+<p>Code Igniter has a config file that lets you store your database connection values (username, password, database name, etc.).  

+The config file is located at:

+

+<p><kbd>application/config/database.php</kbd></p>

+

+<p>The config settings are stored in a multi-dimensional array with this prototype:</p>

+

+<code>$db['default']['hostname'] = "localhost";<br />

+$db['default']['username'] = "root";<br />

+$db['default']['password'] = "";<br />

+$db['default']['database'] = "database_name";<br />

+$db['default']['dbdriver'] = "mysql";<br />

+$db['default']['dbprefix'] = "";<br />

+$db['default']['pconnect'] = TRUE;<br />

+$db['default']['db_debug'] = FALSE;<br />

+$db['default']['active_r'] = TRUE;</code>

+

+<p>The reason we use a multi-dimensional array rather than a more simple one is to permit you to optionally store 

+multiple sets of connection values.  If, for example,  you run multiple environments (development, production, test, etc.) 

+under a single installation, you can set up a connection group for each, then switch between groups as needed.

+For example, to set up a "test" environment you would do this:</p>

+

+<code>$db['test']['hostname'] = "localhost";<br />

+$db['test']['username'] = "root";<br />

+$db['test']['password'] = "";<br />

+$db['test']['database'] = "database_name";<br />

+$db['test']['dbdriver'] = "mysql";<br />

+$db['test']['dbprefix'] = "";<br />

+$db['test']['pconnect'] = TRUE;<br />

+$db['test']['db_debug'] = FALSE;<br />

+$db['test']['active_r'] = TRUE;</code>

+

+ 

+<p>Then, to globally tell the system to use that group you would set this variable located in the config file:</p>

+

+<code>$active_group = "test";</code>

+

+<p>Note: The name "test" is arbitrary.  It can be anything you want. By default we've used the word "default"

+for the primary connection, but it too can be renamed to something more relevant to your project.</p>

+

+<h3>Explanation of Values:</h3>

+

+<ul>

+<li><strong>hostname</strong> - The hostname of your database server. Often this is "localhost".</li> 

+<li><strong>username</strong> - The username used to connect to the database.</li> 

+<li><strong>password</strong> - The password used to connect to the database.</li> 

+<li><strong>database</strong> - The name of the database you want to connect to.</li> 

+<li><strong>dbdriver</strong> - The database type. ie: mysql, postgre, obdc, etc. Must be specified in lower case.</li> 

+<li><strong>dbprefix</strong> - An optional table prefix which will added to the table name when running <a href="active_record.html">Active Record</a> queries.  This permits multiple Code Igniter installations to share one database.</li> 

+<li><strong>pconnect</strong> - TRUE/FALSE (boolean) - Whether to use a persistent connection.</li> 

+<li><strong>db_debug</strong> - TRUE/FALSE (boolean) - Whether database errors should be displayed.</li> 

+<li><strong>active_r</strong> - TRUE/FALSE (boolean) - Whether to load the <a href="active_record.html">Active Record Class</a>. If you are not using the active record class you can have it omitted when the database classes are initialized in order to utilize less resources.</li> 

+</ul>

+

+<p class="important"><strong>Note:</strong> Depending on what database platform you are using (MySQL, Postgre, etc.)

+not all values will be needed.  For example, when using SQLite you will not need to supply a username or password, and

+the database name will be the path to your database file. The information above assumes you are using MySQL.</p>

+

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