mirror of
https://gitlab.com/harald.mueller/aktuelle.kurse.git
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323 lines
9.7 KiB
PHP
323 lines
9.7 KiB
PHP
<?php
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//
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// +----------------------------------------------------------------------+
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// | PHP Version 4 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2002 The PHP Group |
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// +----------------------------------------------------------------------+
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// | This source file is subject to version 2.02 of the PHP license, |
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// | that is bundled with this package in the file LICENSE, and is |
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// | available at through the world-wide-web at |
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// | http://www.php.net/license/2_02.txt. |
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// | If you did not receive a copy of the PHP license and are unable to |
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// | obtain it through the world-wide-web, please send a note to |
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// | license@php.net so we can mail you a copy immediately. |
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// +----------------------------------------------------------------------+
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// | Author: Tomas V.V.Cox <cox@idecnet.com> |
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// +----------------------------------------------------------------------+
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//
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// $Id: ifx.php,v 1.18 2002/02/28 08:27:09 sebastian Exp $
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//
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// Database independent query interface definition for PHP's Informix
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// extension.
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//
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// Legend:
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// For more info on Informix errors see:
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// http://www.informix.com/answers/english/ierrors.htm
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//
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// TODO:
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// - set needed env Informix vars on connect
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// - implement native prepare/execute
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require_once 'DB/common.php';
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class DB_ifx extends DB_common
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{
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var $connection;
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var $affected = 0;
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var $dsn = array();
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var $fetchmode = DB_FETCHMODE_ORDERED; /* Default fetch mode */
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function DB_ifx()
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{
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$this->phptype = 'ifx';
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$this->dbsyntax = 'ifx';
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$this->features = array(
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'prepare' => false,
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'pconnect' => true,
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'transactions' => false,
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'limit' => 'emulate'
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);
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$this->errorcode_map = array(
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'-201' => DB_ERROR_SYNTAX,
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'-206' => DB_ERROR_NOSUCHTABLE,
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'-217' => DB_ERROR_NOSUCHFIELD,
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'-329' => DB_ERROR_NODBSELECTED,
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'-1204' => DB_ERROR_INVALID_DATE,
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'-1205' => DB_ERROR_INVALID_DATE,
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'-1206' => DB_ERROR_INVALID_DATE,
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'-1209' => DB_ERROR_INVALID_DATE,
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'-1210' => DB_ERROR_INVALID_DATE,
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'-1212' => DB_ERROR_INVALID_DATE
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);
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}
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/**
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* Connect to a database and log in as the specified user.
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*
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* @param $dsn the data source name (see DB::parseDSN for syntax)
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* @param $persistent (optional) whether the connection should
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* be persistent
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*
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* @return int DB_OK on success, a DB error code on failure
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*/
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function connect(&$dsninfo, $persistent = false)
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{
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if (!DB::assertExtension('informix'))
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return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
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$this->dsn = $dsninfo;
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$dbhost = $dsninfo['hostspec'] ? '@' . $dsninfo['hostspec'] : '';
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$dbname = $dsninfo['database'] ? $dsninfo['database'] . $dbhost : '';
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$user = $dsninfo['username'] ? $dsninfo['username'] : '';
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$pw = $dsninfo['password'] ? $dsninfo['password'] : '';
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$connect_function = $persistent ? 'ifx_pconnect' : 'ifx_connect';
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$this->connection = @$connect_function($dbname, $user, $pw);
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if (!is_resource($this->connection)) {
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return $this->ifxraiseError(DB_ERROR_CONNECT_FAILED);
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}
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return DB_OK;
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}
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/**
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* Log out and disconnect from the database.
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*
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* @return bool TRUE on success, FALSE if not connected.
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*/
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function disconnect()
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{
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$ret = @ifx_close($this->connection);
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$this->connection = null;
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return $ret;
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}
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/**
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* Send a query to Informix and return the results as a
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* Informix resource identifier.
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*
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* @param $query the SQL query
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*
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* @return int returns a valid Informix result for successful SELECT
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* queries, DB_OK for other successful queries. A DB error code
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* is returned on failure.
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*/
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function simpleQuery($query)
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{
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$this->last_query = $query;
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if (preg_match('/(SELECT)/i', $query)) { //TESTME: Use !DB::isManip()?
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// the scroll is needed for fetching absolute row numbers
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// in a select query result
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$result = @ifx_query($query, $this->connection, IFX_SCROLL);
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} else {
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$result = @ifx_query($query, $this->connection);
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}
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if (!$result) {
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return $this->ifxraiseError();
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}
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$this->affected = ifx_affected_rows ($result);
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// Determine which queries that should return data, and which
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// should return an error code only.
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if (preg_match('/(SELECT)/i', $query)) {
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return $result;
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}
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return DB_OK;
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}
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// {{{ nextResult()
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/**
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* Move the internal ifx result pointer to the next available result
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*
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* @param a valid fbsql result resource
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*
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* @access public
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*
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* @return true if a result is available otherwise return false
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*/
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function nextResult($result)
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{
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return false;
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}
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// }}}
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/**
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* Gets the number of rows affected by the last query.
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* if the last query was a select, returns an _estimate_ value.
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*
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* @return number of rows affected by the last query
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*/
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function affectedRows()
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{
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return $this->affected;
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}
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/**
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* Fetch and return a row of data (it uses fetchInto for that)
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* @param $result Informix result identifier
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* @param $fetchmode format of fetched row array
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* @param $rownum the absolute row number to fetch
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*
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* @return array a row of data, or false on error
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*/
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function fetchRow($result, $fetchmode = DB_FETCHMODE_DEFAULT, $rownum=null)
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{
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if ($fetchmode == DB_FETCHMODE_DEFAULT) {
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$fetchmode = $this->fetchmode;
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}
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$res = $this->fetchInto ($result, $arr, $fetchmode, $rownum);
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if ($res !== DB_OK) {
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return $res;
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}
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return $arr;
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}
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/**
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* Fetch a row and return as array.
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*
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* @param $result Informix result identifier
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* @param $row (reference) array where data from the row is stored
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* @param $fetchmode how the resulting array should be indexed
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* @param $rownum the row number to fetch
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*
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* @return int an array on success, a DB error code on failure, NULL
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* if there is no more data
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*/
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function fetchInto($result, &$row, $fetchmode, $rownum=null)
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{
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if (($rownum !== null) && ($rownum < 0)) {
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return null;
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}
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// if $rownum is null, fetch row will return the next row
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if (!$row = @ifx_fetch_row($result, $rownum)) {
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return null;
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}
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if ($fetchmode !== DB_FETCHMODE_ASSOC) {
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$i=0;
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$order = array();
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foreach ($row as $key => $val) {
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$order[$i++] = $val;
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}
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$row = $order;
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}
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return DB_OK;
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}
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function numRows($result)
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{
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return $this->raiseError(DB_ERROR_NOT_CAPABLE);
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}
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/**
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* Get the number of columns in a result set.
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*
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* @param $result Informix result identifier
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*
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* @return int the number of columns per row in $result
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*/
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function numCols($result)
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{
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if (!$cols = @ifx_num_fields($result)) {
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return $this->ifxraiseError();
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}
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return $cols;
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}
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/**
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* Free the internal resources associated with $result.
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*
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* @param $result Informix result identifier
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*
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* @return bool TRUE on success, DB_error on error
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*/
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function freeResult($result)
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{
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if (is_resource($result)) {
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if (!@ifx_free_result($result)) {
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return $this->ifxraiseError();
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}
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return true;
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}
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if (!isset($this->prepare_tokens[(int)$result])) {
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return false;
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}
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unset($this->prepare_tokens[(int)$result]);
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unset($this->prepare_types[(int)$result]);
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return true;
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}
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function ifxraiseError($errno = null)
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{
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if ($errno === null) {
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$errno = $this->errorCode(ifx_error());
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}
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return $this->raiseError($errno, null, null, null,
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$this->errorNative());
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}
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/**
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* Map native error codes to DB's portable ones. Requires that
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* the DB implementation's constructor fills in the $errorcode_map
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* property.
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*
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* @return int a portable DB error code, or DB_ERROR if this DB
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* implementation has no mapping for the given error code.
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*/
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function errorCode($nativecode)
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{
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if (ereg('SQLCODE=(.*)]', $nativecode, $match)) {
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$code = $match[1];
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if (isset($this->errorcode_map[$code])) {
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return $this->errorcode_map[$code];
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}
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}
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return DB_ERROR;
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}
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/**
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* Get the native error message of the last error (if any) that
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* occured on the current connection.
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*
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* @return int native Informix error code
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*/
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function errorNative()
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{
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return ifx_error() . ' ' . ifx_errormsg();
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}
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// {{{ getSpecialQuery()
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/**
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* Returns the query needed to get some backend info
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* @param string $type What kind of info you want to retrieve
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* @return string The SQL query string
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*/
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function getSpecialQuery($type)
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{
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switch ($type) {
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case 'tables':
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default:
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return null;
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}
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return $sql;
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}
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// }}}
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}
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?>
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