website_jukni/forum/Sources/DbExtra-sqlite.php
2017-12-29 15:51:59 +01:00

346 lines
No EOL
8.4 KiB
PHP

<?php
/**
* Simple Machines Forum (SMF)
*
* @package SMF
* @author Simple Machines http://www.simplemachines.org
* @copyright 2011 Simple Machines
* @license http://www.simplemachines.org/about/smf/license.php BSD
*
* @version 2.0
*/
if (!defined('SMF'))
die('Hacking attempt...');
/* This file contains rarely used extended database functionality.
void db_extra_init()
- add this file's functions to the $smcFunc array.
resource smf_db_backup_table($table, $backup_table)
- backup $table to $backup_table.
- returns the request handle to the table creation query
string function smf_db_get_version()
- get the version number.
string db_insert_sql(string table_name)
- gets all the necessary INSERTs for the table named table_name.
- goes in 250 row segments.
- returns the query to insert the data back in.
- returns an empty string if the table was empty.
array smf_db_list_tables($db = false, $filter = false)
- lists all tables in the database
- could be filtered according to $filter
- returns an array of table names. (strings)
float smf_db_optimize_table($table)
- optimize a table
- $table - the table to be optimized
- returns how much it was gained
string db_table_sql(string table_name)
- dumps the CREATE for the specified table. (by table_name.)
- returns the CREATE statement.
*/
// Add the file functions to the $smcFunc array.
function db_extra_init()
{
global $smcFunc;
if (!isset($smcFunc['db_backup_table']) || $smcFunc['db_backup_table'] != 'smf_db_backup_table')
$smcFunc += array(
'db_backup_table' => 'smf_db_backup_table',
'db_optimize_table' => 'smf_db_optimize_table',
'db_insert_sql' => 'smf_db_insert_sql',
'db_table_sql' => 'smf_db_table_sql',
'db_list_tables' => 'smf_db_list_tables',
'db_get_backup' => 'smf_db_get_backup',
'db_get_version' => 'smf_db_get_version',
);
}
// Backup $table to $backup_table.
function smf_db_backup_table($table, $backup_table)
{
global $smcFunc, $db_prefix;
$table = str_replace('{db_prefix}', $db_prefix, $table);
$result = $smcFunc['db_query']('', '
SELECT sql
FROM sqlite_master
WHERE type = {string:txttable}
AND name = {string:table}',
array(
'table' => $table,
'txttable' => 'table'
)
);
list ($create) = $smcFunc['db_fetch_row']($result);
$smcFunc['db_free_result']($result);
$create = preg_split('/[\n\r]/', $create);
$auto_inc = '';
// Remove the first line and check to see if the second one contain useless info.
unset($create[0]);
if (trim($create[1]) == '(')
unset($create[1]);
if (trim($create[count($create)]) == ')')
unset($create[count($create)]);
foreach ($create as $k => $l)
{
// Get the name of the auto_increment column.
if (strpos($l, 'primary') || strpos($l, 'PRIMARY'))
$auto_inc = trim($l);
// Skip everything but keys...
if ((strpos($l, 'KEY') !== false && strpos($l, 'PRIMARY KEY') === false) || strpos($l, $table) !== false || strpos(trim($l), 'PRIMARY KEY') === 0)
unset($create[$k]);
}
if (!empty($create))
$create = '(
' . implode('
', $create) . ')';
else
$create = '';
// Is there an extra junk at the end?
if (substr($create, -2, 1) == ',')
$create = substr($create, 0, -2) . ')';
if (substr($create, -2) == '))')
$create = substr($create, 0, -1);
$smcFunc['db_query']('', '
DROP TABLE {raw:backup_table}',
array(
'backup_table' => $backup_table,
'db_error_skip' => true,
)
);
$request = $smcFunc['db_quote']('
CREATE TABLE {raw:backup_table} {raw:create}',
array(
'backup_table' => $backup_table,
'create' => $create,
));
$smcFunc['db_query']('', '
CREATE TABLE {raw:backup_table} {raw:create}',
array(
'backup_table' => $backup_table,
'create' => $create,
));
$request = $smcFunc['db_query']('', '
INSERT INTO {raw:backup_table}
SELECT *
FROM {raw:table}',
array(
'backup_table' => $backup_table,
'table' => $table,
));
return $request;
}
// Optimize a table - return data freed!
function smf_db_optimize_table($table)
{
global $smcFunc, $db_prefix;
$table = str_replace('{db_prefix}', $db_prefix, $table);
$request = $smcFunc['db_query']('', '
VACUUM {raw:table}',
array(
'table' => $table,
)
);
if (!$request)
return -1;
$row = $smcFunc['db_fetch_assoc']($request);
$smcFunc['db_free_result']($request);
// The function returns nothing.
return 0;
}
// List all the tables in the database.
function smf_db_list_tables($db = false, $filter = false)
{
global $smcFunc;
$filter = $filter == false ? '' : ' AND name LIKE \'' . str_replace("\_", "_", $filter) . '\'';
$request = $smcFunc['db_query']('', '
SELECT name
FROM sqlite_master
WHERE type = {string:type}
{raw:filter}
ORDER BY name',
array(
'type' => 'table',
'filter' => $filter,
)
);
$tables = array();
while ($row = $smcFunc['db_fetch_row']($request))
$tables[] = $row[0];
$smcFunc['db_free_result']($request);
return $tables;
}
// Get the content (INSERTs) for a table.
function smf_db_insert_sql($tableName)
{
global $smcFunc, $db_prefix;
$tableName = str_replace('{db_prefix}', $db_prefix, $tableName);
// This will be handy...
$crlf = "\r\n";
// Get everything from the table.
$result = $smcFunc['db_query']('', '
SELECT *
FROM {raw:table}',
array(
'table' => $tableName,
)
);
// The number of rows, just for record keeping and breaking INSERTs up.
$num_rows = $smcFunc['db_num_rows']($result);
if ($num_rows == 0)
return '';
$fields = array_keys($smcFunc['db_fetch_assoc']($result));
// SQLite fetches an array so we need to filter out the numberic index for the columns.
foreach ($fields as $key => $name)
if (is_numeric($name))
unset($fields[$key]);
$smcFunc['db_data_seek']($result, 0);
// Start it off with the basic INSERT INTO.
$data = 'BEGIN TRANSACTION;' . $crlf;
// Loop through each row.
while ($row = $smcFunc['db_fetch_row']($result))
{
// Get the fields in this row...
$field_list = array();
for ($j = 0; $j < $smcFunc['db_num_fields']($result); $j++)
{
// Try to figure out the type of each field. (NULL, number, or 'string'.)
if (!isset($row[$j]))
$field_list[] = 'NULL';
elseif (is_numeric($row[$j]) && (int) $row[$j] == $row[$j])
$field_list[] = $row[$j];
else
$field_list[] = '\'' . $smcFunc['db_escape_string']($row[$j]) . '\'';
}
$data .= 'INSERT INTO ' . $tableName . ' (' . implode(', ', $fields) . ') VALUES (' . implode(', ', $field_list) . ');' . $crlf;
}
$smcFunc['db_free_result']($result);
// Return an empty string if there were no rows.
return $num_rows == 0 ? '' : $data . 'COMMIT;' . $crlf;
}
// Get the schema (CREATE) for a table.
function smf_db_table_sql($tableName)
{
global $smcFunc, $db_prefix;
$tableName = str_replace('{db_prefix}', $db_prefix, $tableName);
// This will be needed...
$crlf = "\r\n";
// Start the create table...
$schema_create = '';
$index_create = '';
// Let's get the create statement directly from SQLite.
$result = $smcFunc['db_query']('', '
SELECT sql
FROM sqlite_master
WHERE type = {string:type}
AND name = {string:table_name}',
array(
'type' => 'table',
'table_name' => $tableName,
)
);
list ($schema_create) = $smcFunc['db_fetch_row']($result);
$smcFunc['db_free_result']($result);
// Now the indexes.
$result = $smcFunc['db_query']('', '
SELECT sql
FROM sqlite_master
WHERE type = {string:type}
AND tbl_name = {string:table_name}',
array(
'type' => 'index',
'table_name' => $tableName,
)
);
$indexes = array();
while ($row = $smcFunc['db_fetch_assoc']($result))
if (trim($row['sql']) != '')
$indexes[] = $row['sql'];
$smcFunc['db_free_result']($result);
$index_create .= implode(';' . $crlf, $indexes);
$schema_create = empty($indexes) ? rtrim($schema_create) : $schema_create . ';' . $crlf . $crlf;
return $schema_create . $index_create;
}
// Get the version number.
function smf_db_get_version()
{
return sqlite_libversion();
}
// Simple return the database - and die!
function smf_db_get_backup()
{
global $db_name;
$db_file = substr($db_name, -3) === '.db' ? $db_name : $db_name . '.db';
// Add more info if zipped...
$ext = '';
if (isset($_REQUEST['compress']) && function_exists('gzencode'))
$ext = '.gz';
// Do the remaining headers.
header('Content-Disposition: attachment; filename="' . $db_file . $ext . '"');
header('Cache-Control: private');
header('Connection: close');
// Literally dump the contents. Try reading the file first.
if (@readfile($db_file) == null)
echo file_get_contents($db_file);
obExit(false);
}
?>