Просмотр архива ШАБЛОН САЙТА


<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/

namespace phpbbdbdriver;

/**
* MySQL4 Database Abstraction Layer
* Compatible with:
* MySQL 3.23+
* MySQL 4.0+
* MySQL 4.1+
* MySQL 5.0+
*/
class mysql extends phpbbdbdrivermysql_base
{
    var $multi_insert = true;
    var $connect_error = '';

    /**
    * {@inheritDoc}
    */
    function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)
    {
        $this->persistency = $persistency;
        $this->user = $sqluser;
        $this->server = $sqlserver . (($port) ? ':' . $port : '');
        $this->dbname = $database;

        $this->sql_layer = 'mysql4';

        if ($this->persistency)
        {
            if (!function_exists('mysql_pconnect'))
            {
                $this->connect_error = 'mysql_pconnect function does not exist, is mysql extension installed?';
                return $this->sql_error('');
            }
            $this->db_connect_id = @mysql_pconnect($this->server, $this->user, $sqlpassword);
        }
        else
        {
            if (!function_exists('mysql_connect'))
            {
                $this->connect_error = 'mysql_connect function does not exist, is mysql extension installed?';
                return $this->sql_error('');
            }
            $this->db_connect_id = @mysql_connect($this->server, $this->user, $sqlpassword, $new_link);
        }

        if ($this->db_connect_id && $this->dbname != '')
        {
            if (@mysql_select_db($this->dbname, $this->db_connect_id))
            {
                // Determine what version we are using and if it natively supports UNICODE
                if (version_compare($this->sql_server_info(true), '4.1.0', '>='))
                {
                    @mysql_query("SET NAMES 'utf8'", $this->db_connect_id);

                    // enforce strict mode on databases that support it
                    if (version_compare($this->sql_server_info(true), '5.0.2', '>='))
                    {
                        $result = @mysql_query('SELECT @@session.sql_mode AS sql_mode', $this->db_connect_id);
                        $row = @mysql_fetch_assoc($result);
                        @mysql_free_result($result);
                        $modes = array_map('trim', explode(',', $row['sql_mode']));

                        // TRADITIONAL includes STRICT_ALL_TABLES and STRICT_TRANS_TABLES
                        if (!in_array('TRADITIONAL', $modes))
                        {
                            if (!in_array('STRICT_ALL_TABLES', $modes))
                            {
                                $modes[] = 'STRICT_ALL_TABLES';
                            }

                            if (!in_array('STRICT_TRANS_TABLES', $modes))
                            {
                                $modes[] = 'STRICT_TRANS_TABLES';
                            }
                        }

                        $mode = implode(',', $modes);
                        @mysql_query("SET SESSION sql_mode='{$mode}'", $this->db_connect_id);
                    }
                }
                else if (version_compare($this->sql_server_info(true), '4.0.0', '<'))
                {
                    $this->sql_layer = 'mysql';
                }

                return $this->db_connect_id;
            }
        }

        return $this->sql_error('');
    }

    /**
    * {@inheritDoc}
    */
    function sql_server_info($raw = false, $use_cache = true)
    {
        global $cache;

        if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('mysql_version')) === false)
        {
            $result = @mysql_query('SELECT VERSION() AS version', $this->db_connect_id);
            $row = @mysql_fetch_assoc($result);
            @mysql_free_result($result);

            $this->sql_server_version = $row['version'];

            if (!empty($cache) && $use_cache)
            {
                $cache->put('mysql_version', $this->sql_server_version);
            }
        }

        return ($raw) ? $this->sql_server_version : 'MySQL ' . $this->sql_server_version;
    }

    /**
    * SQL Transaction
    * @access private
    */
    function _sql_transaction($status = 'begin')
    {
        switch ($status)
        {
            case 'begin':
                return @mysql_query('BEGIN', $this->db_connect_id);
            break;

            case 'commit':
                return @mysql_query('COMMIT', $this->db_connect_id);
            break;

            case 'rollback':
                return @mysql_query('ROLLBACK', $this->db_connect_id);
            break;
        }

        return true;
    }

    /**
    * {@inheritDoc}
    */
    function sql_query($query = '', $cache_ttl = 0)
    {
        if ($query != '')
        {
            global $cache;

            // EXPLAIN only in extra debug mode
            if (defined('DEBUG'))
            {
                $this->sql_report('start', $query);
            }
            else if (defined('PHPBB_DISPLAY_LOAD_TIME'))
            {
                $this->curtime = microtime(true);
            }

            $this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;
            $this->sql_add_num_queries($this->query_result);

            if ($this->query_result === false)
            {
                if (($this->query_result = @mysql_query($query, $this->db_connect_id)) === false)
                {
                    $this->sql_error($query);
                }

                if (defined('DEBUG'))
                {
                    $this->sql_report('stop', $query);
                }
                else if (defined('PHPBB_DISPLAY_LOAD_TIME'))
                {
                    $this->sql_time += microtime(true) - $this->curtime;
                }

                if ($cache && $cache_ttl)
                {
                    $this->open_queries[(int) $this->query_result] = $this->query_result;
                    $this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
                }
                else if (strpos($query, 'SELECT') === 0 && $this->query_result)
                {
                    $this->open_queries[(int) $this->query_result] = $this->query_result;
                }
            }
            else if (defined('DEBUG'))
            {
                $this->sql_report('fromcache', $query);
            }
        }
        else
        {
            return false;
        }

        return $this->query_result;
    }

    /**
    * {@inheritDoc}
    */
    function sql_affectedrows()
    {
        if ($this->db_connect_id)
        {
            // We always want the number of matched rows
            // instead of changed rows, when running an update.
            // So when mysql_info() returns the number of matched rows
            // we return that one instead of mysql_affected_rows()
            $mysql_info = @mysql_info($this->db_connect_id);
            if ($mysql_info !== false)
            {
                $match = array();
                preg_match('#^Rows matched: (d)+  Changed: (d)+  Warnings: (d)+$#', $mysql_info, $match);
                if (isset($match[1]))
                {
                    return $match[1];
                }
            }

            return @mysql_affected_rows($this->db_connect_id);
        }
        return false;
    }

    /**
    * {@inheritDoc}
    */
    function sql_fetchrow($query_id = false)
    {
        global $cache;

        if ($query_id === false)
        {
            $query_id = $this->query_result;
        }

        if ($cache && $cache->sql_exists($query_id))
        {
            return $cache->sql_fetchrow($query_id);
        }

        return ($query_id !== false) ? @mysql_fetch_assoc($query_id) : false;
    }

    /**
    * {@inheritDoc}
    */
    function sql_rowseek($rownum, &$query_id)
    {
        global $cache;

        if ($query_id === false)
        {
            $query_id = $this->query_result;
        }

        if ($cache && $cache->sql_exists($query_id))
        {
            return $cache->sql_rowseek($rownum, $query_id);
        }

        return ($query_id !== false) ? @mysql_data_seek($query_id, $rownum) : false;
    }

    /**
    * {@inheritDoc}
    */
    function sql_nextid()
    {
        return ($this->db_connect_id) ? @mysql_insert_id($this->db_connect_id) : false;
    }

    /**
    * {@inheritDoc}
    */
    function sql_freeresult($query_id = false)
    {
        global $cache;

        if ($query_id === false)
        {
            $query_id = $this->query_result;
        }

        if ($cache && !is_object($query_id) && $cache->sql_exists($query_id))
        {
            return $cache->sql_freeresult($query_id);
        }

        if (isset($this->open_queries[(int) $query_id]))
        {
            unset($this->open_queries[(int) $query_id]);
            return @mysql_free_result($query_id);
        }

        return false;
    }

    /**
    * {@inheritDoc}
    */
    function sql_escape($msg)
    {
        if (!$this->db_connect_id)
        {
            return @mysql_real_escape_string($msg);
        }

        return @mysql_real_escape_string($msg, $this->db_connect_id);
    }

    /**
    * return sql error array
    * @access private
    */
    function _sql_error()
    {
        if ($this->db_connect_id)
        {
            $error = array(
                'message'    => @mysql_error($this->db_connect_id),
                'code'        => @mysql_errno($this->db_connect_id),
            );
        }
        else if (function_exists('mysql_error'))
        {
            $error = array(
                'message'    => @mysql_error(),
                'code'        => @mysql_errno(),
            );
        }
        else
        {
            $error = array(
                'message'    => $this->connect_error,
                'code'        => '',
            );
        }

        return $error;
    }

    /**
    * Close sql connection
    * @access private
    */
    function _sql_close()
    {
        return @mysql_close($this->db_connect_id);
    }

    /**
    * Build db-specific report
    * @access private
    */
    function _sql_report($mode, $query = '')
    {
        static $test_prof;

        // current detection method, might just switch to see the existance of INFORMATION_SCHEMA.PROFILING
        if ($test_prof === null)
        {
            $test_prof = false;
            if (version_compare($this->sql_server_info(true), '5.0.37', '>=') && version_compare($this->sql_server_info(true), '5.1', '<'))
            {
                $test_prof = true;
            }
        }

        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;

                    // begin profiling
                    if ($test_prof)
                    {
                        @mysql_query('SET profiling = 1;', $this->db_connect_id);
                    }

                    if ($result = @mysql_query("EXPLAIN $explain_query", $this->db_connect_id))
                    {
                        while ($row = @mysql_fetch_assoc($result))
                        {
                            $html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
                        }
                    }
                    @mysql_free_result($result);

                    if ($html_table)
                    {
                        $this->html_hold .= '</table>';
                    }

                    if ($test_prof)
                    {
                        $html_table = false;

                        // get the last profile
                        if ($result = @mysql_query('SHOW PROFILE ALL;', $this->db_connect_id))
                        {
                            $this->html_hold .= '<br />';
                            while ($row = @mysql_fetch_assoc($result))
                            {
                                // make <unknown> HTML safe
                                if (!empty($row['Source_function']))
                                {
                                    $row['Source_function'] = str_replace(array('<', '>'), array('&lt;', '&gt;'), $row['Source_function']);
                                }

                                // remove unsupported features
                                foreach ($row as $key => $val)
                                {
                                    if ($val === null)
                                    {
                                        unset($row[$key]);
                                    }
                                }
                                $html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
                            }
                        }
                        @mysql_free_result($result);

                        if ($html_table)
                        {
                            $this->html_hold .= '</table>';
                        }

                        @mysql_query('SET profiling = 0;', $this->db_connect_id);
                    }
                }

            break;

            case 'fromcache':
                $endtime = explode(' ', microtime());
                $endtime = $endtime[0] + $endtime[1];

                $result = @mysql_query($query, $this->db_connect_id);
                while ($void = @mysql_fetch_assoc($result))
                {
                    // Take the time spent on parsing rows into account
                }
                @mysql_free_result($result);

                $splittime = explode(' ', microtime());
                $splittime = $splittime[0] + $splittime[1];

                $this->sql_report('record_fromcache', $query, $endtime, $splittime);

            break;
        }
    }
}