database_interface.lib.php

WEBGAME源码,有架设说明,只是非常简单

                    `AVG_ROW_LENGTH`     AS `Avg_row_length`,
                    `DATA_LENGTH`        AS `Data_length`,
                    `MAX_DATA_LENGTH`    AS `Max_data_length`,
                    `INDEX_LENGTH`       AS `Index_length`,
                    `DATA_FREE`          AS `Data_free`,
                    `AUTO_INCREMENT`     AS `Auto_increment`,
                    `CREATE_TIME`        AS `Create_time`,
                    `UPDATE_TIME`        AS `Update_time`,
                    `CHECK_TIME`         AS `Check_time`,
                    `TABLE_COLLATION`    AS `Collation`,
                    `CHECKSUM`           AS `Checksum`,
                    `CREATE_OPTIONS`     AS `Create_options`,
                    `TABLE_COMMENT`      AS `Comment`
               FROM `information_schema`.`TABLES`
              WHERE `TABLE_SCHEMA` = \'' . addslashes( $database ) . '\'
                ' . $sql_where_table;

        $tables = PMA_DBI_fetch_result( $sql, 'TABLE_NAME', NULL, $link );
        unset( $sql_where_table, $sql );
    } else {
        if ( true === $tbl_is_group ) {
            $sql = 'SHOW TABLE STATUS FROM '
                . PMA_backquote( addslashes( $database ) )
                .' LIKE \'' . PMA_escape_mysql_wildcards( addslashes( $table ) ) . '%\'';
        } else {
            $sql = 'SHOW TABLE STATUS FROM '
                . PMA_backquote( addslashes( $database ) ) . ';';
        }
        $tables = PMA_DBI_fetch_result( $sql, 'Name', NULL, $link );
        foreach ( $tables as $table_name => $each_table ) {


            if ( 'comment' === $tbl_is_group
              && 0 === strpos( $each_table['Comment'], $table ) )
            {
                // remove table from list
                unset( $tables[$table_name] );
                continue;
            }

            if ( ! isset( $tables[$table_name]['Type'] )
              && isset( $tables[$table_name]['Engine'] ) ) {
                // pma BC, same parts of PMA still uses 'Type'
                $tables[$table_name]['Type'] =& $tables[$table_name]['Engine'];
            } elseif ( ! isset( $tables[$table_name]['Engine'] )
              && isset( $tables[$table_name]['Type'] ) ) {
                // old MySQL reports Type, newer MySQL reports Engine
                $tables[$table_name]['Engine'] =& $tables[$table_name]['Type'];
            }

            // MySQL forward compatibility
            // so pma could use this array as if every server is of version >5.0
            $tables[$table_name]['TABLE_SCHEMA']      = $database;
            $tables[$table_name]['TABLE_NAME']        =& $tables[$table_name]['Name'];
            $tables[$table_name]['ENGINE']            =& $tables[$table_name]['Engine'];
            $tables[$table_name]['VERSION']           =& $tables[$table_name]['Version'];
            $tables[$table_name]['ROW_FORMAT']        =& $tables[$table_name]['Row_format'];
            $tables[$table_name]['TABLE_ROWS']        =& $tables[$table_name]['Rows'];
            $tables[$table_name]['AVG_ROW_LENGTH']    =& $tables[$table_name]['Avg_row_length'];
            $tables[$table_name]['DATA_LENGTH']       =& $tables[$table_name]['Data_length'];
            $tables[$table_name]['MAX_DATA_LENGTH']   =& $tables[$table_name]['Max_data_length'];
            $tables[$table_name]['INDEX_LENGTH']      =& $tables[$table_name]['Index_length'];
            $tables[$table_name]['DATA_FREE']         =& $tables[$table_name]['Data_free'];
            $tables[$table_name]['AUTO_INCREMENT']    =& $tables[$table_name]['Auto_increment'];
            $tables[$table_name]['CREATE_TIME']       =& $tables[$table_name]['Create_time'];
            $tables[$table_name]['UPDATE_TIME']       =& $tables[$table_name]['Update_time'];
            $tables[$table_name]['CHECK_TIME']        =& $tables[$table_name]['Check_time'];
            $tables[$table_name]['TABLE_COLLATION']   =& $tables[$table_name]['Collation'];
            $tables[$table_name]['CHECKSUM']          =& $tables[$table_name]['Checksum'];
            $tables[$table_name]['CREATE_OPTIONS']    =& $tables[$table_name]['Create_options'];
            $tables[$table_name]['TABLE_COMMENT']     =& $tables[$table_name]['Comment'];

            if ( strtoupper( $tables[$table_name]['Comment'] ) === 'VIEW' ) {
                $tables[$table_name]['TABLE_TYPE'] = 'VIEW';
            } else {
                // TODO difference between 'TEMPORARY' and 'BASE TABLE'
                // but how to detect?
                $tables[$table_name]['TABLE_TYPE'] = 'BASE TABLE';
            }
        }
    }

    if ( $GLOBALS['cfg']['NaturalOrder'] ) {
        uksort( $tables, 'strnatcasecmp' );
    }

    return $tables;
}

/**
 * returns array with databases containing extended infos about them
 *
 * @param   string          $databases      database
 * @param   boolean         $force_stats    retrieve stats also for MySQL < 5
 * @param   resource        $link           mysql link
 * @return  array       $databases
 */
function PMA_DBI_get_databases_full( $database = NULL, $force_stats = false, $link = NULL ) {
    
    // initialize to avoid errors when there are no databases
    $databases = array();
    
    if ( PMA_MYSQL_INT_VERSION >= 50002 ) {
        // get table information from information_schema
        if ( $database ) {
            $sql_where_schema = 'WHERE `SCHEMA_NAME` LIKE \''
                . addslashes( $database ) . '\'';
        } else {
            $sql_where_schema = '';
        }

        // for PMA bc:
        // `SCHEMA_FIELD_NAME` AS `SHOW_TABLE_STATUS_FIELD_NAME`
        $sql = '
             SELECT `information_schema`.`SCHEMATA`.*,
                    COUNT(`information_schema`.`TABLES`.`TABLE_SCHEMA`)
                        AS `SCHEMA_TABLES`,
                    SUM(`information_schema`.`TABLES`.`TABLE_ROWS`)
                        AS `SCHEMA_TABLE_ROWS`,
                    SUM(`information_schema`.`TABLES`.`DATA_LENGTH`)
                        AS `SCHEMA_DATA_LENGTH`,
                    SUM(`information_schema`.`TABLES`.`MAX_DATA_LENGTH`)
                        AS `SCHEMA_MAX_DATA_LENGTH`,
                    SUM(`information_schema`.`TABLES`.`INDEX_LENGTH`)
                        AS `SCHEMA_INDEX_LENGTH`,
                    SUM(`information_schema`.`TABLES`.`DATA_LENGTH`
                      + `information_schema`.`TABLES`.`INDEX_LENGTH`)
                        AS `SCHEMA_LENGTH`,
                    SUM(`information_schema`.`TABLES`.`DATA_FREE`)
                        AS `SCHEMA_DATA_FREE`
               FROM `information_schema`.`SCHEMATA`
          LEFT JOIN `information_schema`.`TABLES`
                 ON `information_schema`.`TABLES`.`TABLE_SCHEMA`
                  = `information_schema`.`SCHEMATA`.`SCHEMA_NAME`
              ' . $sql_where_schema . '
           GROUP BY `information_schema`.`SCHEMATA`.`SCHEMA_NAME`';
        $databases = PMA_DBI_fetch_result( $sql, 'SCHEMA_NAME', NULL, $link );
        unset( $sql_where_schema, $sql );
    } else {
        foreach ( PMA_DBI_get_dblist( $link ) as $database_name ) {
            // MySQL forward compatibility
            // so pma could use this array as if every server is of version >5.0
            $databases[$database_name]['SCHEMA_NAME']      = $database_name;

            if ( $force_stats ) {
                require_once 'mysql_charsets.lib.php';

                $databases[$database_name]['DEFAULT_COLLATION_NAME']
                    = PMA_getDbCollation( $database_name );

                // get additonal info about tables
                $databases[$database_name]['SCHEMA_TABLES']          = 0;
                $databases[$database_name]['SCHEMA_TABLE_ROWS']      = 0;
                $databases[$database_name]['SCHEMA_DATA_LENGTH']     = 0;
                $databases[$database_name]['SCHEMA_MAX_DATA_LENGTH'] = 0;
                $databases[$database_name]['SCHEMA_INDEX_LENGTH']    = 0;
                $databases[$database_name]['SCHEMA_LENGTH']          = 0;
                $databases[$database_name]['SCHEMA_DATA_FREE']       = 0;

                $res = PMA_DBI_query('SHOW TABLE STATUS FROM ' . PMA_backquote( $database_name ) . ';');
                while ( $row = PMA_DBI_fetch_assoc( $res ) ) {
                    $databases[$database_name]['SCHEMA_TABLES']++;
                    $databases[$database_name]['SCHEMA_TABLE_ROWS']
                        += $row['Rows'];
                    $databases[$database_name]['SCHEMA_DATA_LENGTH']
                        += $row['Data_length'];
                    $databases[$database_name]['SCHEMA_MAX_DATA_LENGTH']
                        += $row['Max_data_length'];
                    $databases[$database_name]['SCHEMA_INDEX_LENGTH']
                        += $row['Index_length'];
                    $databases[$database_name]['SCHEMA_DATA_FREE']
                        += $row['Data_free'];
                    $databases[$database_name]['SCHEMA_LENGTH']
                        += $row['Data_length'] + $row['Index_length'];
                }
                PMA_DBI_free_result( $res );
                unset( $res );
            }
        }
    }

    if ( $GLOBALS['cfg']['NaturalOrder'] ) {
        uksort( $databases, 'strnatcasecmp' );
    }

    return $databases;
}

function PMA_DBI_get_fields($database, $table, $link = NULL) {
    if (empty($link)) {
        if (isset($GLOBALS['userlink'])) {
            $link = $GLOBALS['userlink'];
        } else {
            return FALSE;
        }
    }
    // here we use a try_query because when coming from
    // tbl_create + tbl_properties.inc.php, the table does not exist
    $result = PMA_DBI_try_query('SHOW FULL FIELDS FROM ' . PMA_backquote($database) . '.' . PMA_backquote($table), $link);

    if (!$result) {
        return FALSE;
    }

    $fields = array();
    while ($row = PMA_DBI_fetch_assoc($result)) {
        $fields[] = $row;
    }

    return $fields;
}

function PMA_DBI_get_variable($var, $type = PMA_DBI_GETVAR_SESSION, $link = NULL) {
    if ($link === NULL) {
        if (isset($GLOBALS['userlink'])) {
            $link = $GLOBALS['userlink'];
        } else {
            return FALSE;
        }
    }
    if (PMA_MYSQL_INT_VERSION < 40002) {
        $type = 0;
    }
    switch ($type) {
        case PMA_DBI_GETVAR_SESSION:
            $modifier = ' SESSION';
            break;
        case PMA_DBI_GETVAR_GLOBAL:
            $modifier = ' GLOBAL';
            break;
        default:
            $modifier = '';
    }
    $res = PMA_DBI_query('SHOW' . $modifier . ' VARIABLES LIKE \'' . $var . '\';', $link);
    $row = PMA_DBI_fetch_row($res);
    PMA_DBI_free_result($res);
    if (empty($row)) {
        return FALSE;
    } else {
        return $row[0] == $var ? $row[1] : FALSE;
    }
}

function PMA_DBI_postConnect($link, $is_controluser = FALSE) {
    global $collation_connection, $charset_connection;
    if (!defined('PMA_MYSQL_INT_VERSION')) {
        $result = PMA_DBI_query('SELECT VERSION() AS version', $link, PMA_DBI_QUERY_STORE);
        if ($result != FALSE && @PMA_DBI_num_rows($result) > 0) {
            $row   = PMA_DBI_fetch_row($result);
            $match = explode('.', $row[0]);
            PMA_DBI_free_result($result);
        }
        if (!isset($row)) {
            define('PMA_MYSQL_INT_VERSION', 32332);
            define('PMA_MYSQL_STR_VERSION', '3.23.32');
        } else{
            define('PMA_MYSQL_INT_VERSION', (int)sprintf('%d%02d%02d', $match[0], $match[1], intval($match[2])));
            define('PMA_MYSQL_STR_VERSION', $row[0]);
            unset($result, $row, $match);
        }
    }

    if (PMA_MYSQL_INT_VERSION >= 40100) {

        // If $lang is defined and we are on MySQL >= 4.1.x,
        // we auto-switch the lang to its UTF-8 version (if it exists and user didn't force language)
        if (!empty($GLOBALS['lang']) && (substr($GLOBALS['lang'], -5) != 'utf-8') && !isset($GLOBALS['cfg']['Lang'])) {
            $lang_utf_8_version = substr($GLOBALS['lang'], 0, strpos($GLOBALS['lang'], '-')) . '-utf-8';
            if (!empty($GLOBALS['available_languages'][$lang_utf_8_version])) {
                $GLOBALS['lang'] = $lang_utf_8_version;
                $GLOBALS['charset'] = $charset = 'utf-8';
            }
        }