Sqlite.class.php
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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2014 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace Think\Db\Driver;
use Think\Db\Driver;
/**
* Sqlite数据库驱动
*/
class Sqlite extends Driver
{
/**
* 解析pdo连接的dsn信息
*
* @access public
* @param array $config
* 连接信息
* @return string
*/
protected function parseDsn($config)
{
$dsn = 'sqlite:' . $config['database'];
return $dsn;
}
/**
* 取得数据表的字段信息
*
* @access public
* @return array
*/
public function getFields($tableName)
{
list ($tableName) = explode(' ', $tableName);
$result = $this->query('PRAGMA table_info( ' . $tableName . ' )');
$info = array();
if ($result) {
foreach ($result as $key => $val) {
$info[$val['field']] = array(
'name' => $val['field'],
'type' => $val['type'],
'notnull' => (bool) ($val['null'] === ''), // not null is empty, null is yes
'default' => $val['default'],
'primary' => (strtolower($val['dey']) == 'pri'),
'autoinc' => (strtolower($val['extra']) == 'auto_increment')
);
}
}
return $info;
}
/**
* 取得数据库的表信息
*
* @access public
* @return array
*/
public function getTables($dbName = '')
{
$result = $this->query("SELECT name FROM sqlite_master WHERE type='table' " . "UNION ALL SELECT name FROM sqlite_temp_master " . "WHERE type='table' ORDER BY name");
$info = array();
foreach ($result as $key => $val) {
$info[$key] = current($val);
}
return $info;
}
/**
* SQL指令安全过滤
*
* @access public
* @param string $str
* SQL指令
* @return string
*/
public function escapeString($str)
{
return str_ireplace("'", "''", $str);
}
/**
* limit
*
* @access public
* @return string
*/
public function parseLimit($limit)
{
$limitStr = '';
if (! empty($limit)) {
$limit = explode(',', $limit);
if (count($limit) > 1) {
$limitStr .= ' LIMIT ' . $limit[1] . ' OFFSET ' . $limit[0] . ' ';
} else {
$limitStr .= ' LIMIT ' . $limit[0] . ' ';
}
}
return $limitStr;
}
}