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<?php
// +----------------------------------------------------------------------+
// | PHP Version 4 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, |
// | Stig. S. Bakken, Lukas Smith |
// | All rights reserved. |
// +----------------------------------------------------------------------+
// | MDB is a merge of PEAR DB and Metabases that provides a unified DB |
// | API as well as database abstraction for PHP applications. |
// | This LICENSE is in the BSD license style. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | |
// | Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution. |
// | |
// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
// | Lukas Smith nor the names of his contributors may be used to endorse |
// | or promote products derived from this software without specific prior|
// | written permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
// | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
// | POSSIBILITY OF SUCH DAMAGE. |
// +----------------------------------------------------------------------+
// | Original QuerySim Concept & ColdFusion Author: Hal Helms |
// | <hal.helms@teamallaire.com> |
// | Bert Dawson <bdawson@redbanner.com> |
// +----------------------------------------------------------------------+
// | Original PHP Author: Alan Richmond <arichmond@bigfoot.com> |
// | David Huyck <b@bombusbee.com> |
// +----------------------------------------------------------------------+
// | Special note concerning code documentation: |
// | QuerySim was originally created for use during development of |
// | applications built using the Fusebox framework. (www.fusebox.org) |
// | Fusebox uses an XML style of documentation called Fusedoc. (Which |
// | is admittedly not well suited to documenting classes and functions. |
// | This short-coming is being addressed by the Fusebox community.) PEAR |
// | uses a Javadoc style of documentation called PHPDoc. (www.phpdoc.de) |
// | Since this class extension spans two groups of users, it is asked |
// | that the members of each respect the documentation standard of the |
// | other. So it is a further requirement that both documentation |
// | standards be included and maintained. If assistance is required |
// | please contact Alan Richmond. |
// +----------------------------------------------------------------------+
//
// $Id: querysim.php,v 1.6.4.5 2004/02/26 11:51:15 lsmith Exp $
//
/*
<fusedoc fuse="querysim.php" language="PHP">
<responsibilities>
I take information and turn it into a recordset that can be accessed
through the PEAR MDB API. Based on Hal Helms' QuerySim.cfm ColdFusion
custom tag available at halhelms.com.
</responsibilities>
<properties>
<property name="API" value="PEAR MDB" />
<property name="version" value="0.2.1" />
<property name="status" value="beta" />
<history author="Hal Helms" email="hal.helms@teamallaire.com" type="Create" />
<history author="Bert Dawson" email="bdawson@redbanner.com" type="Update">
Extensive revision that is backwardly compatible but eliminates the
need for a separate .sim file.
</history>
<history author="Alan Richmond" email="arichmond@bigfoot.com" type="Create" date="10-July-2002">
Rewrote in PHP as an extention to the PEAR DB API.
Functions supported:
connect, disconnect, query, fetchRow, fetchInto, freeResult,
numCols, numRows, getSpecialQuery
David Huyck (bombusbee.com) added ability to escape special
characters (i.e., delimiters) using a '\'.
Extended PEAR DB options[] for adding incoming parameters. Added
options: columnDelim, dataDelim, eolDelim
</history>
<history author="David Huyck" email="b@bombusbee.com" type="Update" date="19-July-2002">
Added the ability to set the QuerySim options at runtime.
Default options are:
'columnDelim' => ',', // Commas split the column names
'dataDelim' => '|', // Pipes split the data fields
'eolDelim' => chr(13).chr(10) // Carriage returns split the
// lines of data
Affected functions are:
DB_querysim(): set the default options when the
constructor method is called
_parseQuerySim($query): altered the parsing of lines, column
names, and data fields
_empty2null: altered the way this function is called
to simplify calling it
</history>
<history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="24-July-2002">
Added error catching for malformed QuerySim text.
Bug fix _empty2null(): altered version was returning unmodified
lineData.
Cleanup:
PEAR compliant formatting, finished PHPDocs and added 'out' to
Fusedoc 'io'.
Broke up _parseQuerySim() into _buildResult() and _parseOnDelim()
to containerize duplicate parse code.
</history>
<history author="David Huyck" email="b@bombusbee.com" type="Update" date="25-July-2002">
Edited the _buildResult() and _parseOnDelim() functions to improve
reliability of special character escaping.
Re-introduced a custom setOption() method to throw an error when a
person tries to set one of the delimiters to '\'.
</history>
<history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="27-July-2002">
Added '/' delimiter param to preg_quote() in _empty2null() and
_parseOnDelim() so '/' can be used as a delimiter.
Added error check for columnDelim == eolDelim or dataDelim == eolDelim.
Renamed some variables for consistancy.
</history>
<history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="30-July-2002">
Removed private function _empty2null(). Turns out preg_split()
deals with empty elemants by making them zero length strings, just
what they ended up being anyway. This should speed things up a little.
Affected functions:
_parseOnDelim() perform trim on line here, instead of in
_empty2null().
_buildResult() remove call to _empty2null().
_empty2null() removed function.
</history>
<history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="1-Jan-2003">
Ported to PEAR MDB.
Methods supported:
connect, query, getColumnNames, numCols, endOfResult, fetch,
numRows, freeResult, fetchInto, nextResult, setSelectedRowRange
(inherited).
</history>
<history
Removed array_change_key_case() work around for <4.2.0 in
getColumnNames(), found it already done in MDB/Common.php.
</history>
<history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="3-Feb-2003">
Changed default eolDelim to a *nix file eol, since we're trimming
the result anyway, it makes no difference for Windows. Now only
Mac file eols should need to be set (and other kinds of chars).
</history>
<note author="Alan Richmond">
Got WAY too long. See querysim_readme.txt for instructions and some
examples.
io section only documents elements of DB_result that DB_querysim uses,
adds or changes; see MDB and MDB_Common for more info.
io section uses some elements that are not Fusedoc 2.0 compliant:
object and resource.
</note>
</properties>
<io>
<in>
<file path="MDB/Common.php" action="require_once" />
</in>
<out>
<object name="MDB_querysim" extends="MDB_Common" instantiatedby="MDB::connect()">
<resource type="file" name="connection" oncondition="source is external file" scope="class" />
<string name="phptype" default="querysim" />
<string name="dbsyntax" default="querysim" />
<array name="supported" comments="most of these don't actually do anything, they are enabled to simulate the option being available if checked">
<boolean name="Sequences" default="true" />
<boolean name="Indexes" default="true" />
<boolean name="AffectedRows" default="true" />
<boolean name="Summaryfunctions" default="true" />
<boolean name="OrderByText" default="true" />
<boolean name="CurrId" default="true" />
<boolean name="SelectRowRanges" default="true" comments="this one is functional" />
<boolean name="LOBs" default="true" />
<boolean name="Replace" default="true" />
<boolean name="SubSelects" default="true" />
<boolean name="Transactions" default="true" />
</array>
<string name="last_query" comments="last value passed in with query()" />
<array name="options" comments="these can be changed at run time">
<string name="columnDelim" default="," />
<string name="dataDelim" default="|" />
<string name="eolDelim" default="chr(13).chr(10)" />
</array>
</object>
<array name="result" comments="the simulated record set returned by ::query()">
<array comments="columns">
<string comments="column name" />
</array>
<array comments="data">
<array comments="row">
<string comments="data element" />
</array>
</array>
</array>
</out>
</io>
</fusedoc>
*/
require_once 'MDB/Common.php';
/**
* MDB QuerySim driver
*
* @package MDB
* @category Database
* @author Alan Richmond <arichmond@bigfoot.com>
*/
class MDB_querysim extends MDB_Common
{
// Most of the class variables are taken from the corresponding Metabase driver.
// Few are taken from the corresponding PEAR DB driver.
// Some are MDB specific.
var $connection = 0;
var $connected_host;
var $connected_user;
var $connected_password;
var $connected_port;
var $opened_persistent = '';
var $escape_quotes = "\\";
var $decimal_factor = 1.0;
var $highest_fetched_row = array();
var $columns = array();
// }}}
// {{{ constructor
/**
* Constructor
*/
function MDB_querysim()
{
$this->MDB_Common();
$this->phptype = 'querysim';
$this->dbsyntax = 'querysim';
// Most of these are dummies to simulate availability if checked
$this->supported['Sequences'] = 1;
$this->supported['Indexes'] = 1;
$this->supported['AffectedRows'] = 1;
$this->supported['Summaryfunctions'] = 1;
$this->supported['OrderByText'] = 1;
$this->supported['CurrId'] = 1;
$this->supported['SelectRowRanges'] = 1;// this one is real
$this->supported['LOBs'] = 1;
$this->supported['Replace'] = 1;
$this->supported['SubSelects'] = 1;
$this->supported['Transactions'] = 1;
// init QuerySim options
$querySimOptions = array(
'columnDelim' => ',',
'dataDelim' => '|',
'eolDelim' => "\n"
);
// let runtime options overwrite defaults
$this->options = array_merge($querySimOptions, $this->options);
}
// }}}
// {{{ connect()
/**
* Open a file or simulate a successful database connect
*
* @param string $dsn the data source name (see MDB::parseDSN for syntax)
* @param mixed $persistent (optional) boolean whether the connection should
* be persistent (default FALSE) or assoc array of config options
*
* @access public
*
* @return mixed MDB_OK string on success, a MDB error object on failure
*/
function connect()
{
if($this->connection != 0) {
if (!strcmp($this->selected_database, $this->database_name)
&& ($this->opened_persistent == $this->options['persistent']))
{
return MDB_OK;
}
if ($this->selected_database) {
$this->_close($this->connection);
}
$this->connection = 0;
}
if(is_array($this->options)) {
foreach($this->options as $option => $value) {
if((in_array($option, array('columnDelim','dataDelim','eolDelim')))
&& ($value == '\\')) {
return $this->raiseError(MDB_ERROR, null, null,
"MDB Error: option $option cannot be set to '\\'");
}
}
}
$connection = 1;// sim connect
// if external, check file...
if ($this->database_name) {
$file = $this->database_name;
if (!file_exists($file)) {
return $this->raiseError(MDB_ERROR_NOT_FOUND, null, null, 'file not found');
}
if (!is_file($file)) {
return $this->raiseError(MDB_ERROR_INVALID, null, null, 'not a file');
}
if (!is_readable($file)) {
return $this->raiseError(MDB_ERROR_ACCESS_VIOLATION, null, null,
'could not open file - check permissions');
}
// ...and open if persistent
if ($this->options['persistent']) {
$connection = @fopen($file, 'r');
}
}
$this->connection = $connection;
$this->selected_database = $this->database_name;
$this->opened_persistent = $this->options['persistent'];
return MDB_OK;
}
// }}}
// {{{ _close()
/**
* Close a file or simulate a successful database disconnect
*
* @access public
*
* @return bool TRUE on success, FALSE if file closed.
* Always TRUE if simulated.
*/
function _close()
{
$ret = true;
if ($this->connection != 0) {
if (($this->opened_persistent) && (is_resource($this->connection))) {
echo 'closed file';
$ret = @fclose($this->connection);
}
$this->connection = 0;
unset($GLOBALS['_MDB_databases'][$this->database]);
}
return $ret;
}
// }}}
// {{{ setOption()
/**
* Set the option for the MDB class
*
* @param string $option option name
* @param mixed $value value for the option
*
* @return mixed MDB_OK or MDB_Error
*/
function setOption($option, $value)
{
if ((in_array($option, array('columnDelim','dataDelim','eolDelim')))
&& ($value == '\\')
) {
return $this->raiseError("option $option cannot be set to '\\'");
}
if (isset($this->options[$option])) {
$this->options[$option] = $value;
return MDB_OK;
}
return $this->raiseError("unknown option $option");
}
// }}}
// {{{ query()
/**
* Get QuerySim text from appropriate source and return
* the parsed text.
*
* @param string The QuerySim text
* @param mixed $types array that contains the types of the columns in
* the result set
*
* @access public
*
* @return mixed Simulated result set as a multidimentional
* array if valid QuerySim text was passed in. A MDB error
* is returned on failure.
*/
function query($query, $types = null)
{
if ($this->database_name) {
$query = $this->_readFile();
}
$this->debug("Query: $query");
$ismanip = false;
$first = $this->first_selected_row;
$limit = $this->selected_row_limit;
$this->last_query = $query;
if ($result = $this->_buildResult($query)) {
if ($types != null) {
if (!is_array($types)) {
$types = array($types);
}
if (MDB::isError($err = $this->setResultTypes($result, $types))) {
$this->freeResult($result);
return $err;
}
}
if ($limit > 0) {
$result[1] = array_slice($result[1], $first-1, $limit);
}
$this->highest_fetched_row[$this->_querySimSignature($result)] = -1;
return $result;
}
return $this->raiseError();
}
// }}}
// {{{ _readFile()
/**
* Read an external file
*
* @param string filepath/filename
*
* @access private
*
* @return string the contents of a file
*/
function _readFile()
{
$buffer = '';
if ($this->opened_persistent) {
while (!feof($this->connection)) {
$buffer .= fgets($this->connection, 1024);
}
} else {
$this->connection = @fopen($this->selected_database, 'r');
while (!feof($this->connection)) {
$buffer .= fgets($this->connection, 1024);
}
$this->connection = @fclose($this->connection);
}
return $buffer;
}
// }}}
// {{{ _buildResult()
/**
* Convert QuerySim text into an array
*
* @param string Text of simulated query
*
* @access private
*
* @return multi-dimensional array containing the column names and data
* from the QuerySim
*/
function _buildResult($query)
{
$eolDelim = $this->options['eolDelim'];
$columnDelim = $this->options['columnDelim'];
$dataDelim = $this->options['dataDelim'];
$columnNames = array();
$data = array();
if ($columnDelim == $eolDelim) {
return $this->raiseError(MDB_ERROR_INVALID, null, null,
'columnDelim and eolDelim must be different');
} elseif ($dataDelim == $eolDelim){
return $this->raiseError(MDB_ERROR_INVALID, null, null,
'dataDelim and eolDelim must be different');
}
$query = trim($query);
//tokenize escaped slashes
$query = str_replace('\\\\', '[$double-slash$]', $query);
if (!strlen($query)) {
return $this->raiseError(MDB_ERROR_SYNTAX, null, null,
'empty querysim text');
}
$lineData = $this->_parseOnDelim($query, $eolDelim);
//kill the empty last row created by final eol char if it exists
if (!strlen(trim($lineData[count($lineData) - 1]))) {
unset($lineData[count($lineData) - 1]);
}
//populate columnNames array
$thisLine = each($lineData);
$columnNames = $this->_parseOnDelim($thisLine[1], $columnDelim);
if ((in_array('', $columnNames)) || (in_array('null', $columnNames))) {
return $this->raiseError(MDB_ERROR_SYNTAX, null, null,
'all column names must be defined');
}
//replace double-slash tokens with single-slash
$columnNames = str_replace('[$double-slash$]', '\\', $columnNames);
$columnCount = count($columnNames);
$rowNum = 0;
//loop through data lines
if (count($lineData) > 1) {
while ($thisLine = each($lineData)) {
$thisData = $this->_parseOnDelim($thisLine[1], $dataDelim);
$thisDataCount = count($thisData);
if ($thisDataCount != $columnCount) {
$fileLineNo = $rowNum + 2;
return $this->raiseError(MDB_ERROR_SYNTAX, null, null,
"number of data elements ($thisDataCount) in line $fileLineNo not equal to number of defined columns ($columnCount)");
}
//loop through data elements in data line
foreach ($thisData as $thisElement) {
if (strtolower($thisElement) == 'null'){
$thisElement = '';
}
//replace double-slash tokens with single-slash
$data[$rowNum][] = str_replace('[$double-slash$]', '\\', $thisElement);
}//end foreach
++$rowNum;
}//end while
}//end if
return array($columnNames, $data);
}//end function _buildResult()
// }}}
// {{{ _parseOnDelim()
/**
* Split QuerySim string into an array on a delimiter
*
* @param string $thisLine Text of simulated query
* @param string $delim The delimiter to split on
*
* @access private
*
* @return array containing parsed string
*/
function _parseOnDelim($thisLine, $delim)
{
$delimQuoted = preg_quote($delim, '/');
$thisLine = trim($thisLine);
$parsed = preg_split('/(?<!\\\\)' .$delimQuoted. '/', $thisLine);
//replaces escaped delimiters
$parsed = preg_replace('/\\\\' .$delimQuoted. '/', $delim, $parsed);
if ($delim != $this->options['eolDelim']) {
//replaces escape chars
$parsed = preg_replace('/\\\\/', '', $parsed);
}
return $parsed;
}
// }}}
// {{{ _querySimSignature()
/**
* Creates a signature for the QuerySim.
* This is a work-around for not having a resultset resource handle to ref.
*
* @access private
*
* @param array $result the array of QuerySim results
*
* @return string the signature
*/
function _querySimSignature($result)
{
// convert array to string and get hash.
// hash is used to keep length down.
$sig = md5(serialize($result));
return $sig;
}
// }}}
// {{{ getColumnNames()
/**
* Retrieve the names of columns returned by the DBMS in a query result.
*
* @param resource $result result identifier
* @return mixed an associative array variable
* that will hold the names of columns. The
* indexes of the array are the column names
* mapped to lower case and the values are the
* respective numbers of the columns starting
* from 0. Some DBMS may not return any
* columns when the result set does not
* contain any rows.
*
* a MDB error on failure
* @access public
*/
function getColumnNames($result)
{
$result_value = $this->_querySimSignature($result);
if (!isset($this->highest_fetched_row[$result_value])) {
return($this->raiseError(MDB_ERROR, NULL, NULL,
'Get column names: it was specified an inexisting result set'));
}
if (!isset($this->columns[$result_value])) {
$this->columns[$result_value] = array();
$columns = array_flip($result[0]);
if ($this->options['optimize'] == 'portability') {
$columns = array_change_key_case($columns, CASE_LOWER);
}
$this->columns[$result_value] = $columns;
}
return($this->columns[$result_value]);
}
// }}}
// {{{ numCols()
/**
* Count the number of columns returned by the DBMS in a query result.
*
* @param resource $result result identifier
* @access public
* @return mixed integer value with the number of columns, a MDB error
* on failure
*/
function numCols($result)
{
$result_value = $this->_querySimSignature($result);
if (!isset($this->highest_fetched_row[$result_value])) {
return $this->raiseError(MDB_ERROR_INVALID, null, null,
'numCols: a non-existant result set was specified');
}
$cols = count($result[0]);
return $cols;
}
// }}}
// {{{ endOfResult()
/**
* check if the end of the result set has been reached
*
* @param resource $result result identifier
* @return mixed TRUE or FALSE on sucess, a MDB error on failure
* @access public
*/
function endOfResult($result)
{
$result_value = $this->_querySimSignature($result);
if (!isset($this->highest_fetched_row[$result_value])) {
return $this->raiseError(MDB_ERROR, null, null,
'endOfResult(): attempted to check the end of an unknown result');
}
return ($this->highest_fetched_row[$result_value] >= $this->numRows($result)-1);
}
// }}}
// {{{ fetch()
/**
* fetch value from a simulated result set
*
* @param array $result simulated result
* @param int $row number of the row where the data can be found
* @param int $field field number where the data can be found
* @return mixed string on success, a MDB error on failure
* @access public
*/
function fetch($result, $row, $field)
{
$result_value = $this->_querySimSignature($result);
$this->highest_fetched_row[$result_value] = max($this->highest_fetched_row[$result_value], $row);
if (isset($result[1][$row][$field])) {
$res = $result[1][$row][$field];
} else {
return $this->raiseError(MDB_ERROR, null, null,
"fetch(): row $row, field $field is undefined in result set");
}
return $res;
}
// }}}
// {{{ numRows()
/**
* returns the number of rows in a result object
*
* @param ressource $result a valid result ressouce pointer
* @return mixed MDB_Error or the number of rows
* @access public
*/
function numRows($result)
{
$result_value = $this->_querySimSignature($result);
if (!isset($this->highest_fetched_row[$result_value])) {
return $this->raiseError(MDB_ERROR_INVALID, null, null,
'numRows(): a non-existant result set was specified');
}
$rows = @count($result[1]);
return $rows;
}
// }}}
// {{{ freeResult()
/**
* Free the internal resources associated with $result.
*
* @param $result result identifier
* @return bool TRUE on success, FALSE if $result is invalid
* @access public
*/
function freeResult(&$result)
{
$result_value = $this->_querySimSignature($result);
if(isset($this->highest_fetched_row[$result_value])) {
unset($this->highest_fetched_row[$result_value]);
}
if(isset($this->columns[$result_value])) {
unset($this->columns[$result_value]);
}
if(isset($this->result_types[$result_value])) {
unset($this->result_types[$result_value]);
}
if (isset($result)) {
// can't unset() in caller, so this is the best we can do...
$result = null;
} else {
return false;
}
return true;
}
// }}}
// {{{ fetchInto()
/**
* Fetch a row and return data in an array.
*
* @param resource $result result identifier
* @param int $fetchmode ignored
* @param int $rownum the row number to fetch
* @return mixed data array or NULL on success, a MDB error on failure
* @access public
*/
function fetchInto(&$result, $fetchmode = MDB_FETCHMODE_DEFAULT, $rownum = null)
{
$result_value = $this->_querySimSignature($result);
//if specific rownum request
if ($rownum == null) {
++$this->highest_fetched_row[$result_value];
$rownum = $this->highest_fetched_row[$result_value];
} else {
if (!isset($result[1][$rownum])) {
return null;
}
$this->highest_fetched_row[$result_value] =
max($this->highest_fetched_row[$result_value], $rownum);
}
if ($fetchmode == MDB_FETCHMODE_DEFAULT) {
$fetchmode = $this->fetchmode;
}
// get row
if(!$row = @$result[1][$rownum]) {
return null;
}
// make row associative
if (is_array($row) && $fetchmode & MDB_FETCHMODE_ASSOC) {
foreach ($row as $key => $value) {
$arraytemp[$result[0][$key]] = $value;
}
$row = $arraytemp;
if ($this->options['optimize'] == 'portability') {
$row = array_change_key_case($row, CASE_LOWER);
}
}
return $row;
}
// }}}
// {{{ nextResult()
/**
* Move the array result pointer to the next available row
*
* @param array a valid QuerySim result array
* @return true if a result is available otherwise return false
* @access public
*/
function nextResult(&$result)
{
$result_value = $this->_querySimSignature($result);
if (!isset($this->highest_fetched_row[$result_value])) {
return $this->raiseError(MDB_ERROR_INVALID, null, null,
'nextResult(): a non-existant result set was specified');
}
$result_value = $this->_querySimSignature($result);
$setrow = ++$this->highest_fetched_row[$result_value];
return isset($result[1][$setrow]) ? true : false;
}
// }}}
// {{{ tableInfo()
/**
* returns meta data about the result set
*
* @param resource $result result identifier
* @param mixed $mode depends on implementation
* @return array an nested array, or a MDB error
* @access public
*/
//function tableInfo($result, $mode = null)
//{
//}
}
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