Refbase update_2021-01-28_15_58
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query_history.php
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176
query_history.php
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<?php
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// Project: Web Reference Database (refbase) <http://www.refbase.net>
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// Copyright: Matthias Steffens <mailto:refbase@extracts.de> and the file's
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// original author(s).
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//
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// This code is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY. Please see the GNU General Public
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// License for more details.
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//
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// File: ./receipt.php
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// Repository: $HeadURL$
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// Author(s): Matthias Steffens <mailto:refbase@extracts.de>
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//
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// Created: 09-May-08, 12:00
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// Modified: $Date: 2012-02-27 20:25:30 +0000 (Mon, 27 Feb 2012) $
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// $Author$
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// $Revision: 1337 $
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// This php script will display a query history for the user's
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// current session, i.e. it will display links to any previous
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// search results
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// TODO: I18n
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// Incorporate some include files:
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include 'initialize/db.inc.php'; // 'db.inc.php' is included to hide username and password
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include 'includes/header.inc.php'; // include header
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include 'includes/footer.inc.php'; // include footer
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include 'includes/include.inc.php'; // include common functions
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include 'initialize/ini.inc.php'; // include common variables
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// --------------------------------------------------------------------
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// START A SESSION:
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// call the 'start_session()' function (from 'include.inc.php') which will also read out available session variables:
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start_session(true);
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// --------------------------------------------------------------------
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// Initialize preferred display language:
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// (note that 'locales.inc.php' has to be included *after* the call to the 'start_session()' function)
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include 'includes/locales.inc.php'; // include the locales
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// --------------------------------------------------------------------
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// [ Extract form variables sent through POST/GET by use of the '$_REQUEST' variable ]
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// [ !! NOTE !!: for details see <http://www.php.net/release_4_2_1.php> & <http://www.php.net/manual/en/language.variables.predefined.php> ]
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// If there's no stored message available:
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if (!isset($_SESSION['HeaderString']))
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$HeaderString = "Recall a query from your current session:"; // Provide the default message
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else
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{
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$HeaderString = $_SESSION['HeaderString']; // extract 'HeaderString' session variable (only necessary if register globals is OFF!)
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// Note: though we clear the session variable, the current message is still available to this script via '$HeaderString':
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deleteSessionVariable("HeaderString"); // function 'deleteSessionVariable()' is defined in 'include.inc.php'
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}
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// Extract the view type requested by the user (either 'Mobile', 'Print', 'Web' or ''):
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// ('' will produce the default 'Web' output style)
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if (isset($_REQUEST['viewType']))
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$viewType = $_REQUEST['viewType'];
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else
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$viewType = "";
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if (isset($_REQUEST['wrapResults']) AND ($_REQUEST['wrapResults'] == "0"))
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$wrapResults = "0"; // 'wrapResults=0' causes refbase to output only a partial document structure containing solely the query history (i.e. everything is omitted except for the <div id="queryhistory">)
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else
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$wrapResults = "1"; // we'll output a full HTML document structure unless the 'wrapResults' parameter is set explicitly to "0"
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// Get the query URL of the formerly displayed results page:
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if (isset($_SESSION['oldQuery']))
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$oldQuery = $_SESSION['oldQuery'];
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else
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$oldQuery = array();
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// Get any saved links to previous search results:
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if (isset($_SESSION['queryHistory']))
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$queryHistory = $_SESSION['queryHistory'];
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else
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$queryHistory = array();
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// Check if there's any query history available:
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if (empty($queryHistory))
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{
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// return an appropriate error message:
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$HeaderString = returnMsg("No query history available!", "warning", "strong", "HeaderString"); // function 'returnMsg()' is defined in 'include.inc.php'
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header("Location: " . $referer); // variable '$referer' is globally defined in function 'start_session()' in 'include.inc.php'
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exit; // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> !EXIT! <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
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}
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// --------------------------------------------------------------------
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// (4) DISPLAY HEADER & RESULTS
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// (NOTE: Since there's no need to query the database here, we won't perform any of the following: (1) OPEN CONNECTION, (2) SELECT DATABASE, (3) RUN QUERY, (5) CLOSE CONNECTION)
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// Show the login status:
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showLogin(); // (function 'showLogin()' is defined in 'include.inc.php')
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// (4a) DISPLAY header:
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// Call the 'displayHTMLhead()' and 'showPageHeader()' functions (which are defined in 'header.inc.php'):
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if ($wrapResults != "0")
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{
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displayHTMLhead(encodeHTML($officialDatabaseName) . " -- Query History", "noindex,nofollow", "Displays links to previous search results", "", false, "", $viewType, array());
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if (!preg_match("/^(Print|Mobile)$/i", $viewType)) // Note: we omit the visible header in print/mobile view ('viewType=Print' or 'viewType=Mobile')
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showPageHeader($HeaderString);
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echo "\n";
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}
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// (4b) DISPLAY results:
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echo "<div id=\"queryhistory\">";
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// Print a link to the current query:
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if (!empty($oldQuery))
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{
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echo "\n\t<div id=\"currentquery\">"
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. "\n\t\t<h5>Current Query</h5>";
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// Extract the 'WHERE' clause from the current SQL query:
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$queryWhereClause = extractWHEREclause($oldQuery["sqlQuery"]); // function 'extractWHEREclause()' is defined in 'include.inc.php'
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$queryTitle = encodeHTML(explainSQLQuery($queryWhereClause)); // functions 'encodeHTML()' and 'explainSQLQuery()' are defined in 'include.inc.php'
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// Generate a 'search.php' URL that points to the current query:
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$queryURL = generateURL("search.php", "html", $oldQuery, true); // function 'generateURL()' is defined in 'include.inc.php'
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echo "\n\t\t<div class=\"even\">"
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. "\n\t\t\t<a href=\"" . $queryURL . "\">" . $queryTitle . "</a>"
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. "\n\t\t</div>"
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. "\n\t</div>";
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}
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// Print links to any previous search results:
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if (!empty($queryHistory))
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{
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echo "\n\t<div id=\"previousqueries\">"
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. "\n\t\t<h5>Previous Queries</h5>";
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$queryHistory = array_reverse($queryHistory);
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// Display links to previous search results:
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for ($i = 0; $i < count($queryHistory); $i++)
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{
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if (is_integer($i / 2)) // if we currently are at an even number of rows
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$rowClass = "even";
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else
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$rowClass = "odd";
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echo "\n\t\t<div class=\"" . $rowClass . "\">"
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. "\n\t\t\t" . $queryHistory[$i]
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. "\n\t\t</div>";
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}
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echo "\n\t</div>";
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}
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echo "\n</div>";
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// --------------------------------------------------------------------
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// DISPLAY THE HTML FOOTER:
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// Call the 'showPageFooter()' and 'displayHTMLfoot()' functions (which are defined in 'footer.inc.php')
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if ($wrapResults != "0")
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{
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if (!preg_match("/^(Print|Mobile)$/i", $viewType)) // Note: we omit the visible footer in print/mobile view ('viewType=Print' or 'viewType=Mobile')
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showPageFooter($HeaderString);
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displayHTMLfoot();
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}
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// --------------------------------------------------------------------
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?>
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