Current File : //home1/lightco1/www/administrator/components/com_akeeba/BackupEngine/Driver/Query/Mysqli.php
<?php
/**
* Akeeba Engine
* The modular PHP5 site backup engine
* @copyright Copyright (c)2006-2017 Nicholas K. Dionysopoulos / Akeeba Ltd
* @license GNU GPL version 3 or, at your option, any later version
* @package akeebaengine
*/
namespace Akeeba\Engine\Driver\Query;
// Protection against direct access
defined('AKEEBAENGINE') or die();
use Akeeba\Engine\Driver\Query\Base as BaseQuery;
/**
* Query Building Class.
*
* Based on Joomla! Platform 11.3
*/
class Mysqli extends Base implements Limitable
{
/**
* @var integer The offset for the result set.
*/
protected $offset;
/**
* @var integer The limit for the result set.
*/
protected $limit;
/**
* Method to modify a query already in string format with the needed
* additions to make the query limited to a particular number of
* results, or start at a particular offset.
*
* @param string $query The query in string format
* @param integer $limit The limit for the result set
* @param integer $offset The offset for the result set
*
* @return string
*/
public function processLimit($query, $limit, $offset = 0)
{
if ($limit > 0 || $offset > 0)
{
$query .= ' LIMIT ' . $offset . ', ' . $limit;
}
return $query;
}
/**
* Sets the offset and limit for the result set, if the database driver supports it.
*
* Usage:
* $query->setLimit(100, 0); (retrieve 100 rows, starting at first record)
* $query->setLimit(50, 50); (retrieve 50 rows, starting at 50th record)
*
* @param integer $limit The limit for the result set
* @param integer $offset The offset for the result set
*
* @return BaseQuery Returns this object to allow chaining.
*/
public function setLimit($limit = 0, $offset = 0)
{
$this->limit = (int)$limit;
$this->offset = (int)$offset;
return $this;
}
/**
* Concatenates an array of column names or values.
*
* @param array $values An array of values to concatenate.
* @param string $separator As separator to place between each value.
*
* @return string The concatenated values.
*/
public function concatenate($values, $separator = null)
{
if ($separator)
{
$concat_string = 'CONCAT_WS(' . $this->quote($separator);
foreach ($values as $value)
{
$concat_string .= ', ' . $value;
}
return $concat_string . ')';
}
else
{
return 'CONCAT(' . implode(',', $values) . ')';
}
}
}
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