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