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684 lines
27 KiB
PHP
684 lines
27 KiB
PHP
<?php
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// vim: set et ts=4 sw=4 fdm=marker:
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// +----------------------------------------------------------------------+
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// | PHP versions 4 and 5 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, |
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// | Stig. S. Bakken, Lukas Smith |
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// | All rights reserved. |
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// +----------------------------------------------------------------------+
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// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
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// | API as well as database abstraction for PHP applications. |
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// | This LICENSE is in the BSD license style. |
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// | |
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// | Redistribution and use in source and binary forms, with or without |
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// | modification, are permitted provided that the following conditions |
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// | are met: |
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// | |
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// | Redistributions of source code must retain the above copyright |
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// | notice, this list of conditions and the following disclaimer. |
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// | |
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// | Redistributions in binary form must reproduce the above copyright |
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// | notice, this list of conditions and the following disclaimer in the |
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// | documentation and/or other materials provided with the distribution. |
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// | |
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// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
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// | Lukas Smith nor the names of his contributors may be used to endorse |
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// | or promote products derived from this software without specific prior|
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// | written permission. |
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// | |
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// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
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// | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
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// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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// | POSSIBILITY OF SUCH DAMAGE. |
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// +----------------------------------------------------------------------+
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// | Original QuerySim Concept & ColdFusion Author: Hal Helms |
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// | <hal.helms@teamallaire.com> |
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// | Bert Dawson <bdawson@redbanner.com> |
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// +----------------------------------------------------------------------+
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// | Original PHP Author: Alan Richmond <arichmond@bigfoot.com> |
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// | David Huyck <b@bombusbee.com> |
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// +----------------------------------------------------------------------+
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// | Special note concerning code documentation: |
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// | QuerySim was originally created for use during development of |
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// | applications built using the Fusebox framework. (www.fusebox.org) |
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// | Fusebox uses an XML style of documentation called Fusedoc. (Which |
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// | is admittedly not well suited to documenting classes and functions. |
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// | This short-coming is being addressed by the Fusebox community.) PEAR |
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// | uses a Javadoc style of documentation called PHPDoc. (www.phpdoc.de) |
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// | Since this class extension spans two groups of users, it is asked |
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// | that the members of each respect the documentation standard of the |
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// | other. So it is a further requirement that both documentation |
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// | standards be included and maintained. If assistance is required |
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// | please contact Alan Richmond. |
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// +----------------------------------------------------------------------+
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//
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// $Id$
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//
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/*
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<fusedoc fuse="querysim.php" language="PHP">
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<responsibilities>
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I take information and turn it into a recordset that can be accessed
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through the PEAR MDB2 API. Based on Hal Helms' QuerySim.cfm ColdFusion
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custom tag available at halhelms.com.
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</responsibilities>
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<properties>
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<property name="API" value="PEAR MDB2" />
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<property name="version" value="0.2.1" />
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<property name="status" value="beta" />
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<history author="Hal Helms" email="hal.helms@teamallaire.com" type="Create" />
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<history author="Bert Dawson" email="bdawson@redbanner.com" type="Update">
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Extensive revision that is backwardly compatible but eliminates the
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need for a separate .sim file.
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</history>
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<history author="Alan Richmond" email="arichmond@bigfoot.com" type="Create" date="10-July-2002">
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Rewrote in PHP as an extention to the PEAR DB API.
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Functions supported:
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connect, disconnect, query, fetchRow, freeResult,
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numCols, numRows, getSpecialQuery
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David Huyck (bombusbee.com) added ability to escape special
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characters (i.e., delimiters) using a '\'.
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Extended PEAR DB options[] for adding incoming parameters. Added
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options: columnDelim, dataDelim, eolDelim
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</history>
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<history author="David Huyck" email="b@bombusbee.com" type="Update" date="19-July-2002">
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Added the ability to set the QuerySim options at runtime.
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Default options are:
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'columnDelim' => ',', // Commas split the column names
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'dataDelim' => '|', // Pipes split the data fields
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'eolDelim' => chr(13).chr(10) // Carriage returns split the
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// lines of data
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Affected functions are:
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DB_querysim(): set the default options when the
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constructor method is called
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_parseQuerySim($query): altered the parsing of lines, column
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names, and data fields
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_empty2null: altered the way this function is called
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to simplify calling it
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</history>
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<history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="24-July-2002">
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Added error catching for malformed QuerySim text.
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Bug fix _empty2null(): altered version was returning unmodified
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lineData.
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Cleanup:
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PEAR compliant formatting, finished PHPDocs and added 'out' to
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Fusedoc 'io'.
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Broke up _parseQuerySim() into _buildResult() and _parseOnDelim()
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to containerize duplicate parse code.
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</history>
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<history author="David Huyck" email="b@bombusbee.com" type="Update" date="25-July-2002">
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Edited the _buildResult() and _parseOnDelim() functions to improve
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reliability of special character escaping.
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Re-introduced a custom setOption() method to throw an error when a
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person tries to set one of the delimiters to '\'.
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</history>
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<history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="27-July-2002">
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Added '/' delimiter param to preg_quote() in _empty2null() and
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_parseOnDelim() so '/' can be used as a delimiter.
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Added error check for columnDelim == eolDelim or dataDelim == eolDelim.
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Renamed some variables for consistancy.
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</history>
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<history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="30-July-2002">
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Removed protected function _empty2null(). Turns out preg_split()
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deals with empty elemants by making them zero length strings, just
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what they ended up being anyway. This should speed things up a little.
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Affected functions:
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_parseOnDelim() perform trim on line here, instead of in
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_empty2null().
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_buildResult() remove call to _empty2null().
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_empty2null() removed function.
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</history>
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<history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="1-Jan-2003">
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Ported to PEAR MDB2.
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Methods supported:
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connect, query, getColumnNames, numCols, valid, fetch,
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numRows, free, fetchRow, nextResult, setLimit
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(inherited).
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</history>
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<history
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Removed array_change_key_case() work around for <4.2.0 in
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getColumnNames(), found it already done in MDB2/Common.php.
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</history>
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<history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="3-Feb-2003">
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Changed default eolDelim to a *nix file eol, since we're trimming
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the result anyway, it makes no difference for Windows. Now only
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Mac file eols should need to be set (and other kinds of chars).
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</history>
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<note author="Alan Richmond">
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Got WAY too long. See querysim_readme.txt for instructions and some
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examples.
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io section only documents elements of DB_result that DB_querysim uses,
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adds or changes; see MDB2 and MDB2_Driver_Common for more info.
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io section uses some elements that are not Fusedoc 2.0 compliant:
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object and resource.
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</note>
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</properties>
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<io>
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<in>
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<file path="MDB2/Common.php" action="require_once" />
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</in>
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<out>
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<object name="MDB2_querysim" extends="MDB2_Driver_Common" instantiatedby="MDB2::connect()">
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<resource type="file" name="connection" oncondition="source is external file" scope="class" />
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<string name="phptype" default="querysim" />
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<string name="dbsyntax" default="querysim" />
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<array name="supported" comments="most of these don't actually do anything, they are enabled to simulate the option being available if checked">
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<boolean name="sequences" default="true" />
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<boolean name="indexes" default="true" />
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<boolean name="affected_rows" default="true" />
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<boolean name="summary_functions" default="true" />
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<boolean name="order_by_text" default="true" />
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<boolean name="current_id" default="true" />
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<boolean name="limit_querys" default="true" comments="this one is functional" />
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<boolean name="LOBs" default="true" />
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<boolean name="replace" default="true" />
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<boolean name="sub_selects" default="true" />
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<boolean name="transactions" default="true" />
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</array>
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<string name="last_query" comments="last value passed in with query()" />
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<array name="options" comments="these can be changed at run time">
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<string name="columnDelim" default="," />
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<string name="dataDelim" default="|" />
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<string name="eolDelim" default="chr(13).chr(10)" />
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</array>
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</object>
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<array name="result" comments="the simulated record set returned by ::query()">
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<array comments="columns">
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<string comments="column name" />
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</array>
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<array comments="data">
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<array comments="row">
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<string comments="data element" />
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</array>
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</array>
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</array>
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</out>
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</io>
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</fusedoc>
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*/
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/**
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* MDB2 QuerySim driver
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*
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* @package MDB2
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* @category Database
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* @author Alan Richmond <arichmond@bigfoot.com>
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*/
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class MDB2_Driver_querysim extends MDB2_Driver_Common
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{
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// {{{ properties
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var $escape_quotes = "\\";
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// }}}
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// {{{ constructor
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/**
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* Constructor
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*/
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function __construct()
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{
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parent::__construct();
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$this->phptype = 'querysim';
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$this->dbsyntax = 'querysim';
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// Most of these are dummies to simulate availability if checked
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$this->supported['sequences'] = 'emulated';
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$this->supported['indexes'] = true;
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$this->supported['affected_rows'] = false;
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$this->supported['summary_functions'] = false;
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$this->supported['order_by_text'] = false;
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$this->supported['current_id'] = 'emulated';
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$this->supported['limit_queries'] = true;// this one is real
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$this->supported['LOBs'] = true;
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$this->supported['replace'] = 'emulated';
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$this->supported['sub_selects'] = 'emulated';
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$this->supported['transactions'] = false;
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$this->supported['auto_increment'] = false;
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$this->supported['primary_key'] = false;
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$this->options['columnDelim'] = ',';
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$this->options['dataDelim'] = '|';
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$this->options['eolDelim'] = "\n";
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}
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// }}}
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// {{{ connect()
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/**
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* Open a file or simulate a successful database connect
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*
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* @access public
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*
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* @return mixed MDB2_OK string on success, a MDB2 error object on failure
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*/
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function connect()
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{
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if (is_resource($this->connection)) {
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if ($this->connected_database_name == $this->database_name
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&& ($this->opened_persistent == $this->options['persistent'])
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) {
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return MDB2_OK;
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}
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if ($this->connected_database_name) {
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$this->_close($this->connection);
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}
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$this->disconnect();
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}
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$connection = 1;// sim connect
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// if external, check file...
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if ($this->database_name) {
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$file = $this->database_name;
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if (!file_exists($file)) {
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return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null, 'file not found');
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}
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if (!is_file($file)) {
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return $this->raiseError(MDB2_ERROR_INVALID, null, null, 'not a file');
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}
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if (!is_readable($file)) {
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return $this->raiseError(MDB2_ERROR_ACCESS_VIOLATION, null, null,
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'could not open file - check permissions');
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}
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// ...and open if persistent
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if ($this->options['persistent']) {
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$connection = @fopen($file, 'r');
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}
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}
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$this->connection = $connection;
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$this->connected_database_name = $this->database_name;
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$this->opened_persistent = $this->options['persistent'];
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$this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype;
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return MDB2_OK;
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}
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// }}}
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// {{{ disconnect()
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/**
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* Log out and disconnect from the database.
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*
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* @return mixed true on success, false if not connected and error
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* object on error
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* @access public
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*/
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function disconnect()
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{
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if (is_resource($this->connection)) {
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if (($this->opened_persistent) && (is_resource($this->connection))) {
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if (!@fclose($this->connection)) {
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return $this->raiseError();
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}
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}
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$this->connection = 0;
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}
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return MDB2_OK;
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}
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// }}}
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// {{{ _doQuery()
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/**
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* Execute a query
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* @param string $query query
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* @param boolean $isManip if the query is a manipulation query
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* @param resource $connection
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* @param string $database_name
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* @return result or error object
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* @access protected
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*/
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function _doQuery($query, $isManip = false, $connection = null, $database_name = null)
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{
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if ($isManip) {
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return $this->raiseError(MDB2_ERROR_UNSUPPORTED);
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}
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$this->last_query = $query;
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$this->debug($query, 'query');
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if ($this->options['disable_query']) {
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return null;
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}
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$result = $this->_buildResult($query);
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if (PEAR::isError($result)) {
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return $result;
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}
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if ($limit > 0) {
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$result[1] = array_slice($result[1], $offset-1, $limit);
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}
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return $result;
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}
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// }}}
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// {{{ _readFile()
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/**
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* Read an external file
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*
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* @param string filepath/filename
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*
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* @access protected
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*
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* @return string the contents of a file
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*/
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function _readFile()
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{
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$buffer = '';
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if ($this->opened_persistent) {
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while (!feof($this->connection)) {
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$buffer.= fgets($this->connection, 1024);
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}
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} else {
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$this->connection = @fopen($this->connected_database_name, 'r');
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while (!feof($this->connection)) {
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$buffer.= fgets($this->connection, 1024);
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}
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$this->connection = @fclose($this->connection);
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}
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return $buffer;
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}
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// }}}
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// {{{ _buildResult()
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/**
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* Convert QuerySim text into an array
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*
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* @param string Text of simulated query
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*
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* @access protected
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*
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* @return multi-dimensional array containing the column names and data
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* from the QuerySim
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*/
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function _buildResult($query)
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{
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$eolDelim = $this->options['eolDelim'];
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$columnDelim = $this->options['columnDelim'];
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$dataDelim = $this->options['dataDelim'];
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$columnNames = array();
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$data = array();
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if ($columnDelim == $eolDelim) {
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return $this->raiseError(MDB2_ERROR_INVALID, null, null,
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'columnDelim and eolDelim must be different');
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} elseif ($dataDelim == $eolDelim){
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return $this->raiseError(MDB2_ERROR_INVALID, null, null,
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'dataDelim and eolDelim must be different');
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}
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$query = trim($query);
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//tokenize escaped slashes
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$query = str_replace('\\\\', '[$double-slash$]', $query);
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if (!strlen($query)) {
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return $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
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'empty querysim text');
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}
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$lineData = $this->_parseOnDelim($query, $eolDelim);
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//kill the empty last row created by final eol char if it exists
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if (!strlen(trim($lineData[count($lineData) - 1]))) {
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unset($lineData[count($lineData) - 1]);
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}
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//populate columnNames array
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$thisLine = each($lineData);
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$columnNames = $this->_parseOnDelim($thisLine[1], $columnDelim);
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if ((in_array('', $columnNames)) || (in_array('NULL', $columnNames))) {
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return $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
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'all column names must be defined');
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}
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//replace double-slash tokens with single-slash
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$columnNames = str_replace('[$double-slash$]', '\\', $columnNames);
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$columnCount = count($columnNames);
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$rowNum = 0;
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//loop through data lines
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if (count($lineData) > 1) {
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while ($thisLine = each($lineData)) {
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$thisData = $this->_parseOnDelim($thisLine[1], $dataDelim);
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$thisDataCount = count($thisData);
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if ($thisDataCount != $columnCount) {
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$fileLineNo = $rowNum + 2;
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return $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
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"number of data elements ($thisDataCount) in line $fileLineNo not equal to number of defined columns ($columnCount)");
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}
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//loop through data elements in data line
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foreach ($thisData as $thisElement) {
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if (strtoupper($thisElement) == 'NULL'){
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$thisElement = '';
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}
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//replace double-slash tokens with single-slash
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$data[$rowNum][] = str_replace('[$double-slash$]', '\\', $thisElement);
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}//end foreach
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++$rowNum;
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}//end while
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}//end if
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return array($columnNames, $data);
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}//end function _buildResult()
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// }}}
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// {{{ _parseOnDelim()
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/**
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* Split QuerySim string into an array on a delimiter
|
|
*
|
|
* @param string $thisLine Text of simulated query
|
|
* @param string $delim The delimiter to split on
|
|
*
|
|
* @access protected
|
|
*
|
|
* @return array containing parsed string
|
|
*/
|
|
function _parseOnDelim($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;
|
|
}
|
|
// }}}
|
|
}
|
|
|
|
class MDB2_Result_querysim extends MDB2_Result_Common
|
|
{
|
|
// }}}
|
|
// {{{ fetchRow()
|
|
|
|
/**
|
|
* Fetch a row and insert the data into an existing array.
|
|
*
|
|
* @param int $fetchmode how the array data should be indexed
|
|
* @param int $rownum number of the row where the data can be found
|
|
* @return int data array on success, a MDB2 error on failure
|
|
* @access public
|
|
*/
|
|
function &fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null)
|
|
{
|
|
if (is_null($this->result)) {
|
|
$err =& $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
|
'fetchRow: resultset has already been freed');
|
|
return $err;
|
|
}
|
|
if (!is_null($rownum)) {
|
|
$seek = $this->seek($rownum);
|
|
if (PEAR::isError($seek)) {
|
|
return $seek;
|
|
}
|
|
}
|
|
$target_rownum = $this->rownum + 1;
|
|
if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {
|
|
$fetchmode = $this->db->fetchmode;
|
|
}
|
|
if (!isset($this->result[1][$target_rownum])) {
|
|
$null = null;
|
|
return $null;
|
|
}
|
|
$row = $this->result[1][$target_rownum];
|
|
// make row associative
|
|
if ($fetchmode & MDB2_FETCHMODE_ASSOC) {
|
|
$column_names = $this->getColumnNames();
|
|
foreach ($column_names as $name => $i) {
|
|
$column_names[$name] = $row[$i];
|
|
}
|
|
$row = $column_names;
|
|
}
|
|
if (($mode = ($this->db->options['portability'] & MDB2_PORTABILITY_RTRIM)
|
|
+ ($this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL))
|
|
) {
|
|
$this->db->_fixResultArrayValues($row, $mode);
|
|
}
|
|
if (!empty($this->values)) {
|
|
$this->_assignBindColumns($row);
|
|
}
|
|
if (!empty($this->types)) {
|
|
$row = $this->db->datatype->convertResultRow($this->types, $row);
|
|
}
|
|
if ($fetchmode === MDB2_FETCHMODE_OBJECT) {
|
|
$object_class = $this->db->options['fetch_class'];
|
|
if ($object_class == 'stdClass') {
|
|
$row = (object) $row;
|
|
} else {
|
|
$row = &new $object_class($row);
|
|
}
|
|
}
|
|
++$this->rownum;
|
|
return $row;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _getColumnNames()
|
|
|
|
/**
|
|
* Retrieve the names of columns returned by the DBMS in a query result.
|
|
*
|
|
* @return mixed an associative array variable
|
|
* that will hold the names of columns. The
|
|
* indexes of the array are the column names
|
|
* mapped to lower case and the values are the
|
|
* respective numbers of the columns starting
|
|
* from 0. Some DBMS may not return any
|
|
* columns when the result set does not
|
|
* contain any rows.
|
|
*
|
|
* a MDB2 error on failure
|
|
* @access private
|
|
*/
|
|
function _getColumnNames()
|
|
{
|
|
if (is_null($this->result)) {
|
|
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
|
'getColumnNames: resultset has already been freed');
|
|
}
|
|
$columns = array_flip($this->result[0]);
|
|
if ($this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
|
|
$columns = array_change_key_case($columns, $this->db->options['field_case']);
|
|
}
|
|
return $columns;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ numCols()
|
|
|
|
/**
|
|
* Count the number of columns returned by the DBMS in a query result.
|
|
*
|
|
* @access public
|
|
* @return mixed integer value with the number of columns, a MDB2 error
|
|
* on failure
|
|
*/
|
|
function numCols()
|
|
{
|
|
if (is_null($this->result)) {
|
|
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
|
'numCols: resultset has already been freed');
|
|
}
|
|
$cols = count($this->result[0]);
|
|
return $cols;
|
|
}
|
|
}
|
|
|
|
class MDB2_BufferedResult_querysim extends MDB2_Result_querysim
|
|
{
|
|
// {{{ seek()
|
|
|
|
/**
|
|
* seek to a specific row in a result set
|
|
*
|
|
* @param int $rownum number of the row where the data can be found
|
|
* @return mixed MDB2_OK on success, a MDB2 error on failure
|
|
* @access public
|
|
*/
|
|
function seek($rownum = 0)
|
|
{
|
|
if (is_null($this->result)) {
|
|
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
|
'seek: resultset has already been freed');
|
|
}
|
|
$this->rownum = $rownum - 1;
|
|
return MDB2_OK;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ valid()
|
|
|
|
/**
|
|
* check if the end of the result set has been reached
|
|
*
|
|
* @return mixed true or false on sucess, a MDB2 error on failure
|
|
* @access public
|
|
*/
|
|
function valid()
|
|
{
|
|
$numrows = $this->numRows();
|
|
if (PEAR::isError($numrows)) {
|
|
return $numrows;
|
|
}
|
|
return $this->rownum < ($numrows - 1);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ numRows()
|
|
|
|
/**
|
|
* returns the number of rows in a result object
|
|
*
|
|
* @return mixed MDB2 Error Object or the number of rows
|
|
* @access public
|
|
*/
|
|
function numRows()
|
|
{
|
|
if (is_null($this->result)) {
|
|
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
|
'numRows: resultset has already been freed');
|
|
}
|
|
$rows = count($this->result[1]);
|
|
return $rows;
|
|
}
|
|
}
|
|
|
|
|
|
class MDB2_Statement_querysim extends MDB2_Statement_Common
|
|
{
|
|
|
|
}
|
|
|
|
?>
|