initial import. Probably needs some more cleanup
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313
Sources/DumpDatabase.php
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313
Sources/DumpDatabase.php
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<?php
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/******************************************************************************
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* DumpDatabase.php *
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*******************************************************************************
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* SMF: Simple Machines Forum *
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* Open-Source Project Inspired by Zef Hemel (zef@zefhemel.com) *
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* =========================================================================== *
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* Software Version: SMF 1.0 *
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* Software by: Simple Machines (http://www.simplemachines.org) *
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* Copyright 2001-2004 by: Lewis Media (http://www.lewismedia.com) *
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* Support, News, Updates at: http://www.simplemachines.org *
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*******************************************************************************
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* This program is free software; you may redistribute it and/or modify it *
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* under the terms of the provided license as published by Lewis Media. *
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* *
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* This program is distributed in the hope that it is and will be useful, *
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* but WITHOUT ANY WARRANTIES; without even any implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
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* *
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* See the "license.txt" file for details of the Simple Machines license. *
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* The latest version can always be found at http://www.simplemachines.org. *
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******************************************************************************/
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if (!defined('SMF'))
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die('Hacking attempt...');
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/* This file has a single job - database backup. Note that, because of the
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nature of its output, it uses the mysql_query() function instead of
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db_query(), so errors won't be outputted.
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void DumpDatabase2()
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- writes all of the database to standard output.
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- uses gzip compression if compress is set in the URL/post data.
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- may possibly time out in some cases.
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- the data dumped depends on whether "struct" and "data" are passed.
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- requires an administrator and the session hash by get.
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- is accessed via ?action=dumpdb.
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string getTableContent(string table_name)
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- gets all the necessary INSERTs for the table named table_name.
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- goes in 250 row segments.
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- returns the query to insert the data back in.
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- returns an empty string if the table was empty.
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string getTableSQLData(string table_name)
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- dumps the CREATE for the specified table. (by table_name.)
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- returns the CREATE statement.
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*/
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// Dumps the database to a file.
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function DumpDatabase2()
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{
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global $db_name, $db_prefix, $scripturl, $context, $modSettings, $crlf, $db_connection;
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// Administrators only!
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if (!allowedTo('admin_forum'))
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fatal_lang_error('no_dump_database');
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// You can't dump nothing!
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if (!isset($_GET['struct']) && !isset($_GET['data']))
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$_GET['data'] = true;
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checkSession('get');
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// Attempt to stop from dying...
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@set_time_limit(600);
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// Start saving the output... (don't do it otherwise for memory reasons.)
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if (isset($_REQUEST['compress']) && function_exists('gzencode'))
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{
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// Make sure we're gzipping output, but then say we're not in the header ^_^.
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if (empty($modSettings['enableCompressedOutput']))
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@ob_start('ob_gzhandler');
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// Try to clean any data already outputted.
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elseif (ob_get_length() != 0)
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{
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ob_end_clean();
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@ob_start('ob_gzhandler');
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}
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// Send faked headers so it will just save the compressed output as a gzip.
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header('Content-Type: application/x-gzip');
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header('Accept-Ranges: bytes');
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header('Content-Encoding: none');
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// Gecko browsers... don't like this. (Mozilla, Firefox, etc.)
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if (!$context['browser']['is_gecko'])
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header('Content-Transfer-Encoding: binary');
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// The file extension will include .gz...
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$extension = '.sql.gz';
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}
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else
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{
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// Get rid of the gzipping alreading being done.
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if (!empty($modSettings['enableCompressedOutput']))
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@ob_end_clean();
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// If we can, clean anything already sent from the output buffer...
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elseif (function_exists('ob_clean') && ob_get_length() != 0)
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ob_clean();
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// Tell the client to save this file, even though it's text.
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header('Content-Type: application/octetstream');
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header('Content-Encoding: none');
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// This time the extension should just be .sql.
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$extension = '.sql';
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}
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// This should turn off the session URL parser.
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$scripturl = '';
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// Send the proper headers to let them download this file.
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header('Content-Disposition: filename="' . $db_name . '-' . (empty($_GET['struct']) ? 'data' : (empty($_GET['data']) ? 'structure' : 'complete')) . '_' . strftime('%Y-%m-%d') . $extension . '"');
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header('Cache-Control: private');
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header('Connection: close');
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// This makes things simpler when using it so very very often.
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$crlf = "\r\n";
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// SQL Dump Header.
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echo
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'# ==========================================================', $crlf,
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'#', $crlf,
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'# Database dump of tables in `', $db_name, '`', $crlf,
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'# ', timeformat(time(), false), $crlf,
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'#', $crlf,
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'# ==========================================================', $crlf,
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$crlf;
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// Get all tables in the database....
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$queryTables = mysql_query("
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SHOW TABLES
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LIKE '" . strtr($db_prefix, array('_' => '\\_', '%' => '\\%')) . "%'", $db_connection);
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// Dump each table.
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while ($tableName = mysql_fetch_row($queryTables))
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{
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// Are we dumping the structures?
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if (isset($_GET['struct']))
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{
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echo
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$crlf,
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'#', $crlf,
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'# Table structure for table `', $tableName[0], '`', $crlf,
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'#', $crlf,
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$crlf,
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'DROP TABLE IF EXISTS `', $tableName[0], '`;', $crlf,
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$crlf,
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getTableSQLData($tableName[0]), ';', $crlf;
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}
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// How about the data?
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if (!isset($_GET['data']))
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continue;
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// Are there any rows in this table?
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$get_rows = getTableContent($tableName[0]);
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// No rows to get - skip it.
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if (empty($get_rows))
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continue;
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echo
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$crlf,
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'#', $crlf,
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'# Dumping data in `', $tableName[0], '`', $crlf,
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'#', $crlf,
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$crlf,
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$get_rows,
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'# --------------------------------------------------------', $crlf;
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}
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echo
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$crlf,
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'# Done', $crlf;
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exit;
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}
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// Get the content (INSERTs) for a table.
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function getTableContent($tableName)
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{
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global $crlf, $db_connection;
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// Get everything from the table.
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$result = mysql_query("
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SELECT *
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FROM `$tableName`", $db_connection);
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// The number of rows, just for record keeping and breaking INSERTs up.
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$num_rows = mysql_num_rows($result);
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$current_row = 0;
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if ($num_rows == 0)
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return '';
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$fields = array_keys(mysql_fetch_assoc($result));
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mysql_data_seek($result, 0);
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// Start it off with the basic INSERT INTO.
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$data = 'INSERT INTO `' . $tableName . '`' . $crlf . "\t(`" . implode('`, `', $fields) . '`)' . $crlf . 'VALUES ';
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// Loop through each row.
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while ($row = mysql_fetch_row($result))
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{
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$current_row++;
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// Get the fields in this row...
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$field_list = array();
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for ($j = 0; $j < mysql_num_fields($result); $j++)
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{
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// Try to figure out the type of each field. (NULL, number, or 'string'.)
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if (!isset($row[$j]))
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$field_list[] = 'NULL';
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elseif (is_numeric($row[$j]))
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$field_list[] = $row[$j];
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else
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$field_list[] = "'" . mysql_escape_string($row[$j]) . "'";
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}
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// 'Insert' the data.
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$data .= '(' . implode(', ', $field_list) . ')';
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// Start a new INSERT statement after every 250....
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if ($current_row > 249 && $current_row % 250 == 0)
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$data .= ';' . $crlf . 'INSERT INTO `' . $tableName . '`' . $crlf . "\t(`" . implode('`, `', $fields) . '`)' . $crlf . 'VALUES ';
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// All done!
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elseif ($current_row == $num_rows)
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$data .= ';' . $crlf;
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// Otherwise, go to the next line.
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else
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$data .= ',' . $crlf . "\t";
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}
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mysql_free_result($result);
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// Return an empty string if there were no rows.
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return $data;
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}
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// Get the schema (CREATE) for a table.
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function getTableSQLData($tableName)
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{
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global $crlf, $db_connection;
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// Start the create table...
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$schema_create = 'CREATE TABLE `' . $tableName . '` (' . $crlf;
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// Find all the fields.
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$result = mysql_query("
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SHOW FIELDS
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FROM `$tableName`", $db_connection);
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while ($row = mysql_fetch_assoc($result))
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{
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// Make the CREATE for this column.
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$schema_create .= ' ' . $row['Field'] . ' ' . $row['Type'] . ($row['Null'] != 'YES' ? ' NOT NULL' : '');
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// Add a default...?
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if (isset($row['Default']))
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$schema_create .= ' default ' . (is_numeric($row['Default']) ? $row['Default'] : "'" . mysql_escape_string($row['Default']) . "'");
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// And now any extra information. (such as auto_increment.)
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$schema_create .= ($row['Extra'] != '' ? ' ' . $row['Extra'] : '') . ',' . $crlf;
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}
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mysql_free_result($result);
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// Take off the last comma.
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$schema_create = substr($schema_create, 0, -strlen($crlf) - 1);
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// Find the keys.
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$result = mysql_query("
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SHOW KEYS
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FROM `$tableName`", $db_connection);
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$indexes = array();
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while ($row = mysql_fetch_array($result))
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{
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// IS this a primary key, unique index, or regular index?
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$row['Key_name'] = $row['Key_name'] == 'PRIMARY' ? 'PRIMARY KEY' : (empty($row['Non_unique']) ? 'UNIQUE ' : ($row['Comment'] == 'FULLTEXT' ? 'FULLTEXT ' : 'KEY ')) . $row['Key_name'];
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// Is this the first column in the index?
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if (empty($indexes[$row['Key_name']]))
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$indexes[$row['Key_name']] = array();
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// A sub part, like only indexing 15 characters of a varchar.
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if (!empty($row['Sub_part']))
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$indexes[$row['Key_name']][$row['Seq_in_index']] = $row['Column_name'] . '(' . $row['Sub_part'] . ')';
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else
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$indexes[$row['Key_name']][$row['Seq_in_index']] = $row['Column_name'];
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}
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mysql_free_result($result);
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// Build the CREATEs for the keys.
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foreach ($indexes as $keyname => $columns)
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{
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// Ensure the columns are in proper order.
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ksort($columns);
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$schema_create .= ',' . $crlf . ' ' . $keyname . ' (' . implode($columns, ', ') . ')';
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}
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// Now just get the comment and type... (MyISAM, etc.)
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$result = mysql_query("
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SHOW TABLE STATUS
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LIKE '" . strtr($tableName, array('_' => '\\_', '%' => '\\%')) . "'", $db_connection);
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$row = mysql_fetch_assoc($result);
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mysql_free_result($result);
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// Probably MyISAM.... and it might have a comment.
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$schema_create .= $crlf . ') TYPE=' . (isset($row['Type']) ? $row['Type'] : $row['Engine']) . ($row['Comment'] != '' ? ' COMMENT="' . $row['Comment'] . '"' : '');
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return $schema_create;
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}
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?>
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