Difference between revisions of "JDatabase/getInstance"
From Joomla! Documentation
< API15:JDatabase
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Returns a reference to the global Database object, only creating it if it doesn't already exist.
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Revision as of 08:55, 12 May 2013
The "API15" namespace is an archived namespace. This page contains information for a Joomla! version which is no longer supported. It exists only as a historical reference, it will not be improved and its content may be incomplete and/or contain broken links.
Description[edit]
Returns a reference to the global Database object, only creating it if it doesn't already exist.
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Syntax[edit]
& getInstance($options=array())
Parameter Name | Default Value | Description |
---|---|---|
$options | array() | Parameters to be passed to the database driver |
Returns[edit]
A database object
Defined in[edit]
libraries/joomla/database/database.php
Importing[edit]
jimport( 'joomla.database.database' );
Source Body[edit]
function &getInstance( $options = array() )
{
static $instances;
if (!isset( $instances )) {
$instances = array();
}
$signature = serialize( $options );
if (empty($instances[$signature]))
{
$driver = array_key_exists('driver', $options) ? $options['driver'] : 'mysql';
$select = array_key_exists('select', $options) ? $options['select'] : true;
$database = array_key_exists('database', $options) ? $options['database'] : null;
$driver = preg_replace('/[^A-Z0-9_\.-]/i', '', $driver);
$path = dirname(__FILE__).DS.'database'.DS.$driver.'.php';
if (file_exists($path)) {
require_once($path);
} else {
JError::setErrorHandling(E_ERROR, 'die'); //force error type to die
$error = JError::raiseError( 500, JTEXT::_('Unable to load Database Driver:') .$driver);
return $error;
}
$adapter = 'JDatabase'.$driver;
$instance = new $adapter($options);
if ( $error = $instance->getErrorMsg() )
{
JError::setErrorHandling(E_ERROR, 'ignore'); //force error type to die
$error = JError::raiseError( 500, JTEXT::_('Unable to connect to the database:') .$error);
return $error;
}
$instances[$signature] = & $instance;
}
return $instances[$signature];
}
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Examples[edit]
<CodeExamplesForm />