332 lines
8.1 KiB
PHP
332 lines
8.1 KiB
PHP
<?php
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/**
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* MySQLi layer for DBO
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*
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* PHP versions 4 and 5
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*
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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* Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
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*
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* Licensed under The MIT License
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
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* @link http://cakephp.org CakePHP(tm) Project
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* @package cake
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* @subpackage cake.cake.libs.model.datasources.dbo
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* @since CakePHP(tm) v 1.1.4.2974
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* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
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*/
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App::import('Datasource', 'DboMysql');
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/**
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* MySQLi DBO driver object
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*
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* Provides connection and SQL generation for MySQL RDMS using PHP's MySQLi Interface
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*
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* @package cake
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* @subpackage cake.cake.libs.model.datasources.dbo
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*/
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class DboMysqli extends DboMysqlBase {
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/**
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* Datasource Description
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*
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* @var string
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*/
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var $description = "Mysqli DBO Driver";
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/**
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* Base configuration settings for Mysqli driver
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*
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* @var array
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*/
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var $_baseConfig = array(
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'persistent' => true,
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'host' => 'localhost',
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'login' => 'root',
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'password' => '',
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'database' => 'cake',
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'port' => '3306',
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'socket' => null
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);
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/**
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* Connects to the database using options in the given configuration array.
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*
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* @return boolean True if the database could be connected, else false
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*/
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function connect() {
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$config = $this->config;
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$this->connected = false;
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$this->connection = mysqli_connect($config['host'], $config['login'], $config['password'], $config['database'], $config['port'], $config['socket']);
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if ($this->connection !== false) {
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$this->connected = true;
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}
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$this->_useAlias = (bool)version_compare(mysqli_get_server_info($this->connection), "4.1", ">=");
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if (!empty($config['encoding'])) {
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$this->setEncoding($config['encoding']);
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}
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return $this->connected;
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}
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/**
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* Check that MySQLi is installed/enabled
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*
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* @return boolean
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*/
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function enabled() {
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return extension_loaded('mysqli');
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}
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/**
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* Disconnects from database.
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*
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* @return boolean True if the database could be disconnected, else false
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*/
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function disconnect() {
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if (isset($this->results) && is_resource($this->results)) {
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mysqli_free_result($this->results);
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}
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$this->connected = !@mysqli_close($this->connection);
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return !$this->connected;
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}
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/**
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* Executes given SQL statement.
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*
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* @param string $sql SQL statement
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* @return resource Result resource identifier
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* @access protected
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*/
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function _execute($sql) {
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if (preg_match('/^\s*call/i', $sql)) {
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return $this->_executeProcedure($sql);
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}
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return mysqli_query($this->connection, $sql);
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}
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/**
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* Executes given SQL statement (procedure call).
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*
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* @param string $sql SQL statement (procedure call)
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* @return resource Result resource identifier for first recordset
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* @access protected
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*/
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function _executeProcedure($sql) {
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$answer = mysqli_multi_query($this->connection, $sql);
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$firstResult = mysqli_store_result($this->connection);
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if (mysqli_more_results($this->connection)) {
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while ($lastResult = mysqli_next_result($this->connection));
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}
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return $firstResult;
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}
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/**
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* Returns an array of sources (tables) in the database.
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*
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* @return array Array of tablenames in the database
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*/
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function listSources() {
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$cache = parent::listSources();
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if ($cache !== null) {
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return $cache;
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}
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$result = $this->_execute('SHOW TABLES FROM ' . $this->name($this->config['database']) . ';');
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if (!$result) {
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return array();
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}
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$tables = array();
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while ($line = mysqli_fetch_row($result)) {
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$tables[] = $line[0];
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}
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parent::listSources($tables);
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return $tables;
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}
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/**
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* Returns a quoted and escaped string of $data for use in an SQL statement.
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*
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* @param string $data String to be prepared for use in an SQL statement
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* @param string $column The column into which this data will be inserted
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* @param boolean $safe Whether or not numeric data should be handled automagically if no column data is provided
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* @return string Quoted and escaped data
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*/
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function value($data, $column = null, $safe = false) {
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$parent = parent::value($data, $column, $safe);
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if ($parent != null) {
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return $parent;
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}
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if ($data === null || (is_array($data) && empty($data))) {
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return 'NULL';
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}
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if ($data === '' && $column !== 'integer' && $column !== 'float' && $column !== 'boolean') {
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return "''";
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}
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if (empty($column)) {
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$column = $this->introspectType($data);
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}
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switch ($column) {
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case 'boolean':
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return $this->boolean((bool)$data);
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break;
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case 'integer' :
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case 'float' :
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case null :
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if ($data === '') {
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return 'NULL';
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}
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if ((is_int($data) || is_float($data) || $data === '0') || (
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is_numeric($data) && strpos($data, ',') === false &&
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$data[0] != '0' && strpos($data, 'e') === false)) {
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return $data;
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}
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default:
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$data = "'" . mysqli_real_escape_string($this->connection, $data) . "'";
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break;
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}
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return $data;
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}
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/**
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* Returns a formatted error message from previous database operation.
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*
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* @return string Error message with error number
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*/
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function lastError() {
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if (mysqli_errno($this->connection)) {
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return mysqli_errno($this->connection).': '.mysqli_error($this->connection);
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}
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return null;
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}
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/**
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* Returns number of affected rows in previous database operation. If no previous operation exists,
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* this returns false.
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*
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* @return integer Number of affected rows
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*/
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function lastAffected() {
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if ($this->_result) {
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return mysqli_affected_rows($this->connection);
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}
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return null;
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}
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/**
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* Returns number of rows in previous resultset. If no previous resultset exists,
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* this returns false.
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*
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* @return integer Number of rows in resultset
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*/
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function lastNumRows() {
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if ($this->hasResult()) {
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return mysqli_num_rows($this->_result);
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}
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return null;
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}
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/**
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* Returns the ID generated from the previous INSERT operation.
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*
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* @param unknown_type $source
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* @return in
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*/
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function lastInsertId($source = null) {
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$id = $this->fetchRow('SELECT LAST_INSERT_ID() AS insertID', false);
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if ($id !== false && !empty($id) && !empty($id[0]) && isset($id[0]['insertID'])) {
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return $id[0]['insertID'];
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}
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return null;
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}
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/**
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* Enter description here...
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*
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* @param unknown_type $results
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*/
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function resultSet(&$results) {
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if (isset($this->results) && is_resource($this->results) && $this->results != $results) {
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mysqli_free_result($this->results);
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}
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$this->results =& $results;
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$this->map = array();
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$numFields = mysqli_num_fields($results);
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$index = 0;
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$j = 0;
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while ($j < $numFields) {
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$column = mysqli_fetch_field_direct($results, $j);
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if (!empty($column->table)) {
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$this->map[$index++] = array($column->table, $column->name);
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} else {
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$this->map[$index++] = array(0, $column->name);
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}
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$j++;
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}
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}
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/**
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* Fetches the next row from the current result set
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*
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* @return unknown
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*/
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function fetchResult() {
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if ($row = mysqli_fetch_row($this->results)) {
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$resultRow = array();
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foreach ($row as $index => $field) {
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$table = $column = null;
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if (count($this->map[$index]) === 2) {
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list($table, $column) = $this->map[$index];
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}
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$resultRow[$table][$column] = $row[$index];
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}
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return $resultRow;
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}
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return false;
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}
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/**
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* Gets the database encoding
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*
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* @return string The database encoding
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*/
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function getEncoding() {
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return mysqli_client_encoding($this->connection);
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}
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/**
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* Query charset by collation
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*
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* @param string $name Collation name
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* @return string Character set name
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*/
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function getCharsetName($name) {
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if ((bool)version_compare(mysqli_get_server_info($this->connection), "5", ">=")) {
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$cols = $this->query('SELECT CHARACTER_SET_NAME FROM INFORMATION_SCHEMA.COLLATIONS WHERE COLLATION_NAME= ' . $this->value($name) . ';');
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if (isset($cols[0]['COLLATIONS']['CHARACTER_SET_NAME'])) {
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return $cols[0]['COLLATIONS']['CHARACTER_SET_NAME'];
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}
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}
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return false;
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}
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/**
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* Checks if the result is valid
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*
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* @return boolean True if the result is valid, else false
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*/
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function hasResult() {
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return is_object($this->_result);
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}
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}
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