cakephp2-php8/cake/libs/model/dbo/dbo_sqlite.php

<?php
/* SVN FILE: $Id$ */

/**
 * SQLite layer for DBO
 * 
 * Long description for file
 *
 * PHP versions 4 and 5
 *
 * CakePHP :  Rapid Development Framework <http://www.cakephp.org/>
 * Copyright (c) 2005, CakePHP Authors/Developers
 *
 * Author(s): Michal Tatarynowicz aka Pies <tatarynowicz@gmail.com>
 *            Larry E. Masters aka PhpNut <nut@phpnut.com>
 *            Kamil Dzielinski aka Brego <brego.dk@gmail.com>
 *
 *  Licensed under The MIT License
 *  Redistributions of files must retain the above copyright notice.
 *
 * @filesource 
 * @author       CakePHP Authors/Developers
 * @copyright    Copyright (c) 2005, CakePHP Authors/Developers
 * @link         https://trac.cakephp.org/wiki/Authors Authors/Developers
 * @package      cake
 * @subpackage   cake.cake.libs.model.dbo
 * @since        CakePHP v 0.9.0
 * @version      $Revision$
 * @modifiedby   $LastChangedBy$
 * @lastmodified $Date$
 * @license      http://www.opensource.org/licenses/mit-license.php The MIT License
 */

/**
 * Include DBO.
 */
uses('model'.DS.'dbo'.DS.'dbo');

/**
 * DBO implementation for the SQLite DBMS.
 * 
 * Long description for class
 *
 * @package    cake
 * @subpackage cake.cake.libs.model.dbo
 * @since      CakePHP v 0.9.0
 */
class DBO_SQLite extends DBO 
{

/**
 * Connects to the database using config['file'] as a filename.
 *
 * @param array $config Configuration array for connecting
 * @return mixed
 */
   function connect($config) 
   {
      if ($config) 
      {
         $this->config = $config;
         $this->_conn = $config['connect']($config['file']);
      }
      $this->connected = $this->_conn? true: false;

      if($this->connected)
      {
         return $this->_conn;
      }
      else
      {
         //die('Could not connect to DB.');
      }
   }

/**
 * Disconnects from database.
 *
 * @return boolean True if the database could be disconnected, else false
 */
   function disconnect() 
   {
      return sqlite_close($this->_conn);
   }

/**
 * Executes given SQL statement.
 *
 * @param string $sql SQL statement
 * @return resource Result resource identifier
 */
   function execute($sql) 
   {
      return sqlite_query($this->_conn, $sql);
   }

/**
 * Returns a row from given resultset as an array.
 *
 * @return array The fetched row as an array
 */
   function fetchRow() 
   {
      return sqlite_fetch_array($this->_result);
   }

/**
 * Returns an array of tables in the database. If there are no tables, an error is raised and the application exits.
 *
 * @return array Array of tablenames in the database
 */
   function tablesList() 
   {
      $result = sqlite_query($this->_conn, "SELECT name FROM sqlite_master WHERE type='table' ORDER BY name;");

      if (!$result) 
      {
         trigger_error(ERROR_NO_TABLE_LIST, E_USER_NOTICE);
         exit;
      }
      else 
      {
         $tables = array();
         while ($line = sqlite_fetch_array($result)) 
         {
            $tables[] = $line[0];
         }
         return $tables;
      }
   }
   
	/**
	 * Returns an array of the fields in given table name.
	 *
	 * @param string $tableName 	Name of database table to inspect
	 * @return array 				Fields in table. Keys are name and type
	 */
   function fields($tableName)
   {
      $fields = false;
      $cols = sqlite_fetch_column_types($tableName, $this->_conn);

      foreach ($cols as $column => $type)
      {
         $fields[] = array('name'=>$column, 'type'=>$type);
      }

      return $fields;
   }

	/**
	 * Returns a quoted and escaped string of $data for use in an SQL statement.
	 *
	 * @param string $data String to be prepared for use in an SQL statement
	 * @return string Quoted and escaped
	 */
   function prepareValue($data)
   {
      return "'" . sqlite_escape_string($data) . "'";
   }

	/**
	 * Returns a formatted error message from previous database operation.
	 *
	 * @return string Error message
	 */
   function lastError() 
   {
      return sqlite_last_error($this->_conn)? sqlite_last_error($this->_conn).': '.sqlite_error_string(sqlite_last_error($this->_conn)): null;
   }

	/**
	 * Returns number of affected rows in previous database operation. If no previous operation exists, this returns false.
	 *
	 * @return int Number of affected rows
	 */
   function lastAffected()
   {
      return $this->_result? sqlite_changes($this->_conn): false;
   }

	/**
	 * Returns number of rows in previous resultset. If no previous resultset exists, 
	 * this returns false.
	 *
	 * @return int Number of rows in resultset
	 */
   function lastNumRows() 
   {
      return $this->_result? sqlite_num_rows($this->_result): false;
   }

	/**
	 * Returns the ID generated from the previous INSERT operation.
	 *
	 * @return int 
	 */
   function lastInsertId() 
   {
      return sqlite_last_insert_rowid($this->_conn);
   }

	/**
	 * Returns a limit statement in the correct format for the particular database.
	 *
	 * @param int $limit 		Limit of results returned
	 * @param int $offset 		Offset from which to start results
	 * @return string 			SQL limit/offset statement
	 */
   function selectLimit($limit, $offset=null)
   {
      return " LIMIT {$limit}".($offset? ", {$offset}": null);
   }
}
?>