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<?php
/**
+-----------------------------------------------------------------------+
| program/include/rcube_db_mysql.php |
| |
| This file is part of the Roundcube Webmail client |
| Copyright (C) 2005-2012, The Roundcube Dev Team |
| |
| Licensed under the GNU General Public License version 3 or |
| any later version with exceptions for skins & plugins. |
| See the README file for a full license statement. |
| |
| PURPOSE: |
| Database wrapper class that implements PHP PDO functions |
| for MySQL database |
| |
+-----------------------------------------------------------------------+
| Author: Aleksander Machniak <alec@alec.pl> |
+-----------------------------------------------------------------------+
*/
/**
* Database independent query interface
*
* This is a wrapper for the PHP PDO
*
* @package Database
* @version 1.0
*/
class rcube_db_mysql extends rcube_db
{
public $db_provider = 'mysql';
/**
* Driver initialization/configuration
*/
protected function init()
{
// SQL identifiers quoting
$this->options['identifier_start'] = '`';
$this->options['identifier_end'] = '`';
}
/**
* Abstract SQL statement for value concatenation
*
* @return string SQL statement to be used in query
*/
public function concat(/* col1, col2, ... */)
{
$args = func_get_args();
if (is_array($args[0])) {
$args = $args[0];
}
return 'CONCAT(' . join(', ', $args) . ')';
}
/**
* Returns PDO DSN string from DSN array
*
* @param array $dsn DSN parameters
*
* @return string Connection string
*/
protected function dsn_string($dsn)
{
$params = array();
$result = 'mysql:';
if ($dsn['database']) {
$params[] = 'dbname=' . $dsn['database'];
}
if ($dsn['hostspec']) {
$params[] = 'host=' . $dsn['hostspec'];
}
if ($dsn['port']) {
$params[] = 'port=' . $dsn['port'];
}
if ($dsn['socket']) {
$params[] = 'unix_socket=' . $dsn['socket'];
}
$params[] = 'charset=utf8';
if (!empty($params)) {
$result .= implode(';', $params);
}
return $result;
}
/**
* Returns driver-specific connection options
*
* @param array $dsn DSN parameters
*
* @return array Connection options
*/
protected function dsn_options($dsn)
{
$result = array();
if (!empty($dsn['key'])) {
$result[PDO::MYSQL_ATTR_KEY] = $dsn['key'];
}
if (!empty($dsn['cipher'])) {
$result[PDO::MYSQL_ATTR_CIPHER] = $dsn['cipher'];
}
if (!empty($dsn['cert'])) {
$result[PDO::MYSQL_ATTR_SSL_CERT] = $dsn['cert'];
}
if (!empty($dsn['capath'])) {
$result[PDO::MYSQL_ATTR_SSL_CAPATH] = $dsn['capath'];
}
if (!empty($dsn['ca'])) {
$result[PDO::MYSQL_ATTR_SSL_CA] = $dsn['ca'];
}
return $result;
}
/**
* Get database runtime variables
*
* @param string $varname Variable name
* @param mixed $default Default value if variable is not set
*
* @return mixed Variable value or default
*/
public function get_variable($varname, $default = null)
{
if (!isset($this->variables)) {
$this->variables = array();
$result = $this->query('SHOW VARIABLES');
while ($sql_arr = $this->fetch_array($result)) {
$this->variables[$row[0]] = $row[1];
}
}
return isset($this->variables[$varname]) ? $this->variables[$varname] : $default;
}
}
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