database.php

osCommerce最好的电子商务程序 2.2

<?php
/*
  $Id: database.php,v 1.1.1.2 2004/10/09 17:03:37 cvsadmin Exp $

  osCommerce, Open Source E-Commerce Solutions
  http://www.oscommerce.com

  Copyright (c) 2003 osCommerce

  Released under the GNU General Public License
*/

  function osc_db_connect($server, $username, $password, $link = 'db_link') {
    global $$link, $db_error;

    $db_error = false;

    if (!$server) {
      $db_error = 'No Server selected.';
      return false;
    }

    $$link = @mysql_connect($server, $username, $password) or $db_error = mysql_error();

    return $$link;
  }

  function osc_db_select_db($database) {
    return mysql_select_db($database);
  }

  function osc_db_close($link = 'db_link') {
    global $$link;

    return mysql_close($$link);
  }

  function osc_db_query($query, $link = 'db_link') {
    global $$link;

    return mysql_query($query, $$link);
  }

  function osc_db_fetch_array($db_query) {
    return mysql_fetch_array($db_query);
  }

  function osc_db_num_rows($db_query) {
    return mysql_num_rows($db_query);
  }

  function osc_db_data_seek($db_query, $row_number) {
    return mysql_data_seek($db_query, $row_number);
  }

  function osc_db_insert_id() {
    return mysql_insert_id();
  }

  function osc_db_free_result($db_query) {
    return mysql_free_result($db_query);
  }

  function osc_db_test_create_db_permission($database) {
    global $db_error;

    $db_created = false;
    $db_error = false;

    if (!$database) {
      $db_error = 'No Database selected.';
      return false;
    }

    if (!$db_error) {
      if (!@osc_db_select_db($database)) {
        $db_created = true;
        if (!@osc_db_query('create database ' . $database)) {
          $db_error = mysql_error();
        }
      } else {
        $db_error = mysql_error();
      }
      if (!$db_error) {
        if (@osc_db_select_db($database)) {
          if (@osc_db_query('create table temp ( temp_id int(5) )')) {
            if (@osc_db_query('drop table temp')) {
              if ($db_created) {
                if (@osc_db_query('drop database ' . $database)) {
                } else {
                  $db_error = mysql_error();
                }
              }
            } else {
              $db_error = mysql_error();
            }
          } else {
            $db_error = mysql_error();
          }
        } else {
          $db_error = mysql_error();
        }
      }
    }

    if ($db_error) {
      return false;
    } else {
      return true;
    }
  }

  function osc_db_test_connection($database) {
    global $db_error;

    $db_error = false;

    if (!$db_error) {
      if (!@osc_db_select_db($database)) {
        $db_error = mysql_error();
      } else {
        if (!@osc_db_query('select count(*) from osc_configuration')) {
          $db_error = mysql_error();
        }
      }
    }

    if ($db_error) {
      return false;
    } else {
      return true;
    }
  }

  function osc_db_install($database, $sql_file) {
    global $db_error;

    $db_error = false;

    if (!@osc_db_select_db($database)) {
      if (@osc_db_query('create database ' . $database)) {
        osc_db_select_db($database);
      } else {
        $db_error = mysql_error();
      }
    }

    if (!$db_error) {
      if (file_exists($sql_file)) {
        $fd = fopen($sql_file, 'rb');
        $restore_query = fread($fd, filesize($sql_file));
        fclose($fd);
      } else {
        $db_error = 'SQL file does not exist: ' . $sql_file;
        return false;
      }

      $sql_array = array();
      $sql_length = strlen($restore_query);
      $pos = strpos($restore_query, ';');
      for ($i=$pos; $i<$sql_length; $i++) {
        if ($restore_query[0] == '#') {
          $restore_query = ltrim(substr($restore_query, strpos($restore_query, "\n")));
          $sql_length = strlen($restore_query);
          $i = strpos($restore_query, ';')-1;
          continue;
        }
        if ($restore_query[($i+1)] == "\n") {
          for ($j=($i+2); $j<$sql_length; $j++) {
            if (trim($restore_query[$j]) != '') {
              $next = substr($restore_query, $j, 6);
              if ($next[0] == '#') {
// find out where the break position is so we can remove this line (#comment line)
                for ($k=$j; $k<$sql_length; $k++) {
                  if ($restore_query[$k] == "\n") break;
                }
                $query = substr($restore_query, 0, $i+1);
                $restore_query = substr($restore_query, $k);
// join the query before the comment appeared, with the rest of the dump
                $restore_query = $query . $restore_query;
                $sql_length = strlen($restore_query);
                $i = strpos($restore_query, ';')-1;
                continue 2;
              }
              break;
            }
          }
          if ($next == '') { // get the last insert query
            $next = 'insert';
          }
          if ( (eregi('create', $next)) || (eregi('insert', $next)) || (eregi('drop t', $next)) ) {
            $next = '';
            $sql_array[] = substr($restore_query, 0, $i);
            $restore_query = ltrim(substr($restore_query, $i+1));
            $sql_length = strlen($restore_query);
            $i = strpos($restore_query, ';')-1;
          }
        }
      }

      osc_db_query("drop table if exists osc_address_book, osc_address_format, osc_banners, osc_banners_history, osc_categories, osc_categories_description, osc_configuration, osc_configuration_group, osc_counter, osc_counter_history, osc_countries, osc_currencies, osc_customers, osc_customers_basket, osc_customers_basket_attributes, osc_customers_info, osc_languages, osc_manufacturers, osc_manufacturers_info, osc_orders, osc_orders_products, osc_orders_status, osc_orders_status_history, osc_orders_products_attributes, osc_orders_products_download, osc_products, osc_products_attributes, osc_products_attributes_download, osc_prodcts_description, osc_products_options, osc_products_options_values, osc_products_options_values_to_products_options, osc_products_to_categories, osc_reviews, osc_reviews_description, osc_sessions, osc_specials, osc_tax_class, osc_tax_rates, osc_geo_zones, osc_whos_online, osc_zones, osc_zones_to_geo_zones");

      for ($i=0; $i<sizeof($sql_array); $i++) {
        osc_db_query($sql_array[$i]);
      }
    } else {
      return false;
    }
  }
?>