327 lines
9.2 KiB
PHP
327 lines
9.2 KiB
PHP
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<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Db
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* @subpackage Adapter
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* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: Abstract.php 12629 2008-11-13 17:23:13Z alexander $
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*/
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/**
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* @see Zend_Db_Adapter_Abstract
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*/
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require_once 'Zend/Db/Adapter/Abstract.php';
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/**
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* @see Zend_Loader
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*/
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require_once 'Zend/Loader.php';
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/**
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* @see Zend_Db_Statement_Pdo
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*/
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require_once 'Zend/Db/Statement/Pdo.php';
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/**
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* Class for connecting to SQL databases and performing common operations using PDO.
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*
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* @category Zend
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* @package Zend_Db
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* @subpackage Adapter
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* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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abstract class Zend_Db_Adapter_Pdo_Abstract extends Zend_Db_Adapter_Abstract
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{
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/**
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* Default class name for a DB statement.
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*
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* @var string
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*/
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protected $_defaultStmtClass = 'Zend_Db_Statement_Pdo';
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/**
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* Creates a PDO DSN for the adapter from $this->_config settings.
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*
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* @return string
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*/
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protected function _dsn()
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{
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// baseline of DSN parts
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$dsn = $this->_config;
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// don't pass the username, password, and driver_options in the DSN
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unset($dsn['username']);
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unset($dsn['password']);
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unset($dsn['options']);
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unset($dsn['driver_options']);
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// use all remaining parts in the DSN
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foreach ($dsn as $key => $val) {
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$dsn[$key] = "$key=$val";
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}
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return $this->_pdoType . ':' . implode(';', $dsn);
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}
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/**
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* Creates a PDO object and connects to the database.
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*
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* @return void
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* @throws Zend_Db_Adapter_Exception
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*/
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protected function _connect()
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{
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// if we already have a PDO object, no need to re-connect.
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if ($this->_connection) {
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return;
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}
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// get the dsn first, because some adapters alter the $_pdoType
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$dsn = $this->_dsn();
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// check for PDO extension
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if (!extension_loaded('pdo')) {
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/**
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* @see Zend_Db_Adapter_Exception
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*/
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require_once 'Zend/Db/Adapter/Exception.php';
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throw new Zend_Db_Adapter_Exception('The PDO extension is required for this adapter but the extension is not loaded');
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}
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// check the PDO driver is available
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if (!in_array($this->_pdoType, PDO::getAvailableDrivers())) {
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/**
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* @see Zend_Db_Adapter_Exception
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*/
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require_once 'Zend/Db/Adapter/Exception.php';
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throw new Zend_Db_Adapter_Exception('The ' . $this->_pdoType . ' driver is not currently installed');
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}
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// create PDO connection
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$q = $this->_profiler->queryStart('connect', Zend_Db_Profiler::CONNECT);
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try {
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$this->_connection = new PDO(
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$dsn,
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$this->_config['username'],
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$this->_config['password'],
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$this->_config['driver_options']
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);
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$this->_profiler->queryEnd($q);
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// set the PDO connection to perform case-folding on array keys, or not
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$this->_connection->setAttribute(PDO::ATTR_CASE, $this->_caseFolding);
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// always use exceptions.
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$this->_connection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
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} catch (PDOException $e) {
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/**
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* @see Zend_Db_Adapter_Exception
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*/
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require_once 'Zend/Db/Adapter/Exception.php';
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throw new Zend_Db_Adapter_Exception($e->getMessage());
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}
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}
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/**
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* Force the connection to close.
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*
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* @return void
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*/
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public function closeConnection()
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{
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$this->_connection = null;
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}
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/**
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* Prepares an SQL statement.
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*
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* @param string $sql The SQL statement with placeholders.
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* @param array $bind An array of data to bind to the placeholders.
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* @return PDOStatement
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*/
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public function prepare($sql)
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{
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$this->_connect();
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$stmtClass = $this->_defaultStmtClass;
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Zend_Loader::loadClass($stmtClass);
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$stmt = new $stmtClass($this, $sql);
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$stmt->setFetchMode($this->_fetchMode);
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return $stmt;
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}
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/**
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* Gets the last ID generated automatically by an IDENTITY/AUTOINCREMENT column.
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*
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* As a convention, on RDBMS brands that support sequences
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* (e.g. Oracle, PostgreSQL, DB2), this method forms the name of a sequence
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* from the arguments and returns the last id generated by that sequence.
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* On RDBMS brands that support IDENTITY/AUTOINCREMENT columns, this method
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* returns the last value generated for such a column, and the table name
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* argument is disregarded.
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*
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* On RDBMS brands that don't support sequences, $tableName and $primaryKey
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* are ignored.
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*
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* @param string $tableName OPTIONAL Name of table.
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* @param string $primaryKey OPTIONAL Name of primary key column.
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* @return string
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*/
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public function lastInsertId($tableName = null, $primaryKey = null)
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{
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$this->_connect();
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return $this->_connection->lastInsertId();
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}
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/**
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* Special handling for PDO query().
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* All bind parameter names must begin with ':'
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*
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* @param string|Zend_Db_Select $sql The SQL statement with placeholders.
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* @param array $bind An array of data to bind to the placeholders.
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* @return Zend_Db_Statement_Pdo
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* @throws Zend_Db_Adapter_Exception To re-throw PDOException.
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*/
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public function query($sql, $bind = array())
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{
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if (is_array($bind)) {
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foreach ($bind as $name => $value) {
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if (!is_int($name) && !preg_match('/^:/', $name)) {
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$newName = ":$name";
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unset($bind[$name]);
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$bind[$newName] = $value;
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}
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}
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}
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try {
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return parent::query($sql, $bind);
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} catch (PDOException $e) {
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/**
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* @see Zend_Db_Statement_Exception
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*/
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require_once 'Zend/Db/Statement/Exception.php';
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throw new Zend_Db_Statement_Exception($e->getMessage());
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}
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}
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/**
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* Quote a raw string.
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*
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* @param string $value Raw string
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* @return string Quoted string
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*/
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protected function _quote($value)
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{
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if (is_int($value) || is_float($value)) {
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return $value;
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}
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$this->_connect();
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return $this->_connection->quote($value);
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}
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/**
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* Begin a transaction.
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*/
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protected function _beginTransaction()
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{
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$this->_connect();
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$this->_connection->beginTransaction();
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}
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/**
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* Commit a transaction.
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*/
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protected function _commit()
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{
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$this->_connect();
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$this->_connection->commit();
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}
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/**
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* Roll-back a transaction.
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*/
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protected function _rollBack() {
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$this->_connect();
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$this->_connection->rollBack();
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}
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/**
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* Set the PDO fetch mode.
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*
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* @todo Support FETCH_CLASS and FETCH_INTO.
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*
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* @param int $mode A PDO fetch mode.
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* @return void
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* @throws Zend_Db_Adapter_Exception
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*/
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public function setFetchMode($mode)
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{
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//check for PDO extension
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if (!extension_loaded('pdo')) {
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/**
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* @see Zend_Db_Adapter_Exception
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*/
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require_once 'Zend/Db/Adapter/Exception.php';
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throw new Zend_Db_Adapter_Exception('The PDO extension is required for this adapter but the extension is not loaded');
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}
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switch ($mode) {
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case PDO::FETCH_LAZY:
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case PDO::FETCH_ASSOC:
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case PDO::FETCH_NUM:
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case PDO::FETCH_BOTH:
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case PDO::FETCH_NAMED:
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case PDO::FETCH_OBJ:
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$this->_fetchMode = $mode;
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break;
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default:
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/**
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* @see Zend_Db_Adapter_Exception
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*/
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require_once 'Zend/Db/Adapter/Exception.php';
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throw new Zend_Db_Adapter_Exception("Invalid fetch mode '$mode' specified");
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break;
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}
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}
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/**
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* Check if the adapter supports real SQL parameters.
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*
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* @param string $type 'positional' or 'named'
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* @return bool
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*/
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public function supportsParameters($type)
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{
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switch ($type) {
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case 'positional':
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case 'named':
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default:
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return true;
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}
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}
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}
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