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<?php
/**
*
* @package dbal
* @version $Id$
* @copyright (c) 2005 phpBB Group
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
*
*/
/**
* @ignore
*/
if (!defined('SQL_LAYER'))
{
define('SQL_LAYER', 'mysqli');
include($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
/**
* @package dbal
* MySQLi Database Abstraction Layer
* Minimum Requirement is MySQL 4.1+ and the mysqli-extension
*/
class dbal_mysqli extends dbal
{
/**
* Connect to server
*/
function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false)
{
$this->persistency = $persistency;
$this->user = $sqluser;
$this->server = $sqlserver . (($port) ? ':' . $port : '');
$this->dbname = $database;
$this->db_connect_id = ($this->persistency) ? @mysqli_pconnect($this->server, $this->user, $sqlpassword) : @mysqli_connect($this->server, $this->user, $sqlpassword);
if ($this->db_connect_id && $this->dbname != '')
{
if (@mysqli_select_db($this->db_connect_id, $this->dbname))
{
return $this->db_connect_id;
}
}
return $this->sql_error('');
}
/**
* sql transaction
*/
function sql_transaction($status = 'begin')
{
switch ($status)
{
case 'begin':
$result = @mysqli_autocommit($this->db_connect_id, false);
$this->transaction = true;
break;
case 'commit':
$result = @mysqli_commit($this->db_connect_id);
@mysqli_autocommit($this->db_connect_id, true);
$this->transaction = false;
if (!$result)
{
@mysqli_rollback($this->db_connect_id);
@mysqli_autocommit($this->db_connect_id, true);
}
break;
case 'rollback':
$result = @mysqli_rollback($this->db_connect_id);
@mysqli_autocommit($this->db_connect_id, true);
$this->transaction = false;
break;
default:
$result = true;
}
return $result;
}
/**
* Base query method
*/
function sql_query($query = '', $cache_ttl = 0)
{
if ($query != '')
{
global $cache;
// EXPLAIN only in extra debug mode
if (defined('DEBUG_EXTRA'))
{
$this->sql_report('start', $query);
}
$this->query_result = ($cache_ttl && method_exists($cache, 'sql_load')) ? $cache->sql_load($query) : false;
if (!$this->query_result)
{
$this->num_queries++;
if (($this->query_result = @mysqli_query($this->db_connect_id, $query)) === false)
{
$this->sql_error($query);
}
if (defined('DEBUG_EXTRA'))
{
$this->sql_report('stop', $query);
}
if ($cache_ttl && method_exists($cache, 'sql_save'))
{
$cache->sql_save($query, $this->query_result, $cache_ttl);
}
}
else if (defined('DEBUG_EXTRA'))
{
$this->sql_report('fromcache', $query);
}
}
else
{
return false;
}
return ($this->query_result) ? $this->query_result : false;
}
/**
* Build LIMIT query
*/
function sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
{
if ($query != '')
{
$this->query_result = false;
// if $total is set to 0 we do not want to limit the number of rows
if ($total == 0)
{
// MySQL 4.1+ no longer supports -1 in limit queries
$total = 18446744073709551615;
}
$query .= "\n LIMIT " . ((!empty($offset)) ? $offset . ', ' . $total : $total);
return $this->sql_query($query, $cache_ttl);
}
else
{
return false;
}
}
/**
* Return number of rows
* Not used within core code
*/
function sql_numrows($query_id = false)
{
if (!$query_id)
{
$query_id = $this->query_result;
}
return ($query_id) ? @mysqli_num_rows($query_id) : false;
}
/**
* Return number of affected rows
*/
function sql_affectedrows()
{
return ($this->db_connect_id) ? @mysqli_affected_rows($this->db_connect_id) : false;
}
/**
* Fetch current row
*/
function sql_fetchrow($query_id = false)
{
global $cache;
if (!$query_id)
{
$query_id = $this->query_result;
}
if (!is_object($query_id) && isset($cache->sql_rowset[$query_id]))
{
return $cache->sql_fetchrow($query_id);
}
return ($query_id) ? @mysqli_fetch_assoc($query_id) : false;
}
/**
* Fetch field
* if rownum is false, the current row is used, else it is pointing to the row (zero-based)
*/
function sql_fetchfield($field, $rownum = false, $query_id = false)
{
if (!$query_id)
{
$query_id = $this->query_result;
}
if ($query_id)
{
if ($rownum !== false)
{
$this->sql_rowseek($rownum, $query_id);
}
$row = $this->sql_fetchrow($query_id);
return isset($row[$field]) ? $row[$field] : false;
}
return false;
}
/**
* Seek to given row number
* rownum is zero-based
*/
function sql_rowseek($rownum, $query_id = false)
{
if (!$query_id)
{
$query_id = $this->query_result;
}
return ($query_id) ? @mysqli_data_seek($query_id, $rownum) : false;
}
/**
* Get last inserted id after insert statement
*/
function sql_nextid()
{
return ($this->db_connect_id) ? @mysqli_insert_id($this->db_connect_id) : false;
}
/**
* Free sql result
*/
function sql_freeresult($query_id = false)
{
if (!$query_id)
{
$query_id = $this->query_result;
}
// Make sure it is not a cached query
if (is_object($this->query_result))
{
return @mysqli_free_result($query_id);
}
return false;
}
/**
* Escape string used in sql query
*/
function sql_escape($msg)
{
return @mysqli_real_escape_string($this->db_connect_id, $msg);
}
/**
* return sql error array
* @private
*/
function _sql_error()
{
return array(
'message' => @mysqli_error($this->db_connect_id),
'code' => @mysqli_errno($this->db_connect_id)
);
}
/**
* Close sql connection
* @private
*/
function _sql_close()
{
return @mysqli_close($this->db_connect_id);
}
/**
* Build db-specific report
* @private
*/
function _sql_report($mode, $query = '')
{
switch ($mode)
{
case 'start':
$explain_query = $query;
if (preg_match('/UPDATE ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m))
{
$explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2];
}
else if (preg_match('/DELETE FROM ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m))
{
$explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2];
}
if (preg_match('/^SELECT/', $explain_query))
{
$html_table = false;
if ($result = @mysqli_query($this->db_connect_id, "EXPLAIN $explain_query"))
{
while ($row = @mysqli_fetch_assoc($result))
{
$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
}
}
@mysqli_free_result($result);
if ($html_table)
{
$this->html_hold .= '</table>';
}
}
break;
case 'fromcache':
$endtime = explode(' ', microtime());
$endtime = $endtime[0] + $endtime[1];
$result = @mysqli_query($this->db_connect_id, $query);
while ($void = @mysqli_fetch_assoc($result))
{
// Take the time spent on parsing rows into account
}
@mysqli_free_result($result);
$splittime = explode(' ', microtime());
$splittime = $splittime[0] + $splittime[1];
$this->sql_report('record_fromcache', $query, $endtime, $splittime);
break;
}
}
}
} // if ... define
?>
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