mysql數據庫連接類

mysql數據庫連接類
/*******************************
 * PHP MySQL Connect
 * Author  : Ray
 * Date    : 2005/07/30
 * Updata  : 2005/10/23
 * Version : 0.1
 */
 
/* 判斷連接數據庫所需的參數是否存在 */
if (empty($dbhost))
{
    $error = "<li>數據庫主機名為空</li>";
}
if (empty($dbuser))
{
    $error .= "<li>數據庫用戶名為空</li>";
}
/*if (empty($dbpass))
{
    $error .= "<li>數據庫密碼為空</li>";
}*/
if (empty($dbname))
{
    $error .= "<li>數據庫名為空</li>";
}

if (isset($error)) showErrorMessage("1","數據庫操作失敗",$error);

/* 連接數據庫 */
    if (!$connect = @mysql_connect($dbhost,$dbuser,$dbpass))
    {
        $error = "<li>無法連接上數據庫主機</li><li>MySQL錯誤信息：".mysql_error()."</li>";
        showErrorMessage("1","數據庫連接失敗",$error);exit;
    }
   
    if (!$select_db = @mysql_select_db($dbname))
    {
        $error = "<li>無法打開數據庫</li><li>MySQL錯誤信息：".mysql_error()."</li>";
        showErrorMessage("1","數據庫打開失敗",$error);exit;
    }
    mysql_query("set names 'gbk'");
/* 數據庫查詢 */   
function dbQuery ($mysql_query,$debug = 0)
{
    if ($debug != 0)
    {
        echo $mysql_query."n";
        if ($debug == 1) return;
    }
    $GLOBALS['mysql']['query_count']++;
    if (!$query = @mysql_query($mysql_query))
    {
        $error = "<li>MySQL語句在執行時遇到了一些錯誤</li><li>MySQL語句：".$mysql_query."</li><li>MySQL錯誤信息：".mysql_error()."</li>";
        showErrorMessage("1","錯誤的MySql查詢",$error);exit;
    }
    if ($debug != 0) echo "ROWS:".mysql_num_rows($query);
    return $query;
}

/* 查詢結果分解到數組 */ 
function dbArray ($mysql_result)
{
    return @mysql_fetch_array($mysql_result);
}

function queryBot($query_data)
{
    if (!empty($query_data['field']))
    {
        foreach ($query_data['field'] as $field => $value)
        {
            switch ($query_data['action'])
            {
                case 'insert' :
                    $query_insert_field[(int)$i] .= "`".$field."`";
                    $query_insert_value[(int)$i] .= "'".$value."'";
                    break;
                case 'update' :
                    $query_update_field[(int)$i] .= "`".$field."` = '".$value."'";
                    unset($query_update_where);
                    foreach ($query_data['where'] as $field => $value)
                    {
                        $query_update_where[(int)$j] .= "`".$field."` = '".$value."'";
                    }
                    $j++;
                    break;
            }
            $i++;
        }
            switch ($query_data['action'])
            {
                case 'insert' :
                    dbQuery("INSERT INTO `".$GLOBALS['prefix'].$query_data['table']."` (".implode(" , ",$query_insert_field).") VALUES (".implode(" , ",$query_insert_value).");");
                    break;
                case 'update' :
                    dbQuery("UPDATE `".$GLOBALS['prefix'].$query_data['table']."` SET ".implode(" , ",$query_update_field)." WHERE ".implode(" AND ",$query_update_where).";");
                    break;
            }
    }
}