mysql操作类

<?php
class MySQL
{
       var $serverName        = '';       //数据库主机
       var $admin              ='';
       var $password              ='';
       var $dbName               = '';       //数据库名
       var $dbUsername        = '';       // 数据库用户名
       var $dbPassword        = '';       // 数据库密码
       var $usePconnect        = 0;
       var $website        ='';
       var $id                             = 0;
       var $linkId                      = 0;
       var $queryId               = 0;

       var $queryCount        = 0;
       var $result;
       var $record               = array();
       var $rows;
       var $affectedRows = 0;
       var $insertId;

       var $errno;
       var $error;

       var $queryLog = array();

       function GetErrDesc()
       {
              $this->error = @mysql_error( $this->linkId );
              return $this->error;
       } 

       function GetErrNo()
       {
              $this->errno = @mysql_errno( $this->linkId );
              return $this->errno;
       } 

       function Connect()
       {
              if ( $this->usePconnect == 1 )
              {
                     if ( !$this->linkId = @mysql_pconnect( $this->serverName, $this->dbUsername, $this->dbPassword ) )
                            $this->Halt( 'Connect faild!' );
              }
              else
              {
                     if ( !$this->linkId = @mysql_connect( $this->serverName, $this->dbUsername, $this->dbPassword ) )
                            $this->Halt( 'Connect faild!' );
              } 
              return $this->linkId;
       } 

       function SelectDB()
       {
              if ( !mysql_select_db( $this->dbName ) )
                     $this->Halt( 'Connect faild!' );
       } 

       function Query( $queryStr )
       {
              $this->result = mysql_query( $queryStr, $this->linkId );
              if ( !$this->result )
                     $this->Halt( 'Invalid SQL: ' . $queryStr );
              return $this->result;
       } 

       function Update( $queryStr )
       {
              $this->Query( $queryStr );
              return $this->AffectedRows();
       }

       function FetchArray( $queryId, $fetchType = 'assoc' )
       {
              if ( empty( $queryId ) )
                     $this->Halt( 'Invalid query id:' . $queryId );

              if ( $fetchType = 'assoc' )
                     $this->record = mysql_fetch_assoc( $queryId );
              else
                     $this->record = mysql_fetch_array( $queryId );

              return $this->record;
       }

       function FetchRow( $queryId )
       {
              if ( empty( $queryId ) )
                     $this->Halt( 'Invalid query id:' . $queryId );

              $this->record = mysql_fetch_row( $queryId );
              return $this->record;
       }

       function FetchOne( $query, $field = '' )
       {
              if ( empty( $query ) )
                     $this->Halt( 'Invalid query id:' . $query );
              $this->result = $this->Query( $query );
              $this->record = $this->FetchArray( $this->result );
              if ( $field != '' )
                     return $this->record[$field];
              else
                     return $this->record;
       }

       function FetchAll( $query, $field = '' )
       {
              if ( empty( $query ) )
                     $this->Halt( 'Invalid query id:' . $query );

              $this->result = $this->Query( $query );
              if ( $field != '' )
              {
                     while ( $this->record = $this->FetchArray( $this->result ) )
                            $result[] = $this->record[$field];
              }
              else
              {
                     while ( $this->record = $this->FetchArray( $this->result ) )
                            $result[] = $this->record;
              }
              return $result;
       }

       function NumRows( $queryId )
       {
              if ( empty( $queryId ) )
                     $this->Halt( 'Invalid query id:' . $queryId );

              $this->rows = mysql_num_rows( $queryId );
              return $this->rows;
       } 

       function AffectedRows()
       {
              $this->AffectedRows = mysql_affected_rows( $this->linkId );
              return $this->AffectedRows;
       } 

       function FreeResult( $query )
       {
              if ( !mysql_free_result( $query ) )
                     $this->Halt( 'Fail to mysql_free_result' );
       } 

       function InsertId()
       {
              $this->insertId = mysql_insert_id();
              if ( !$this->insertIid )
                     $this->Halt( 'Fail to get mysql_insert_id' );
              return $this->insertId;
       } 

       function Close()
       {
              @mysql_close( $this->linkId );
       } 

       function Halt( $msg )
       {
              $message = "<html>\n<head>\n";
              $message .= "<meta content=\"text/html; charset=GBK\" http-equiv=\"Content-Type\">\n";
              $message .= "<style type=\"text/css\">\n";
              $message .= "body,td,p,pre {font-family : Verdana, Arial;font-size : 14px;}\n";
              $message .= "</style>\n";
              $message .= "</head>\n";
              $message .= "<body>\n";
              $content  = '<p>MySQL Database Error!!!</p><pre><b>' . htmlspecialchars( $msg ) . "</b></pre>\n";
              $content .= '<b>MySQL error description</b>: ' . $this->GetErrDesc() . "\n<br>";
              $content .= '<b>MySQL error number</b>: ' . $this->GetErrNo() . "\n<br>";
              $content .= '<b>Date</b>: ' . date( 'Y-m-d @ H:i' ) . "\n<br>";
              $content .= '<b>Script</b>: http://' . $_SERVER['HTTP_HOST'] . getenv( 'REQUEST_URI' ) . "\n<br><br>";

              $message .= $content;
              $message .= "</body>\n</html>";
              echo $message;
              exit;
       }

       function NR( $queryId )
       {
              return $this->NumRows( $queryId );
       }

       function FM( $sql, $field = '' )
       {
              return $this->FetchAll( $sql, $field );
       }

       function FA( $queryId, $fetchType = 'assoc' )
       {
              return $this->FetchArray( $queryId, $fetchType );
       }

       function FO( $query, $field = '' )
       {
              return $this->FetchOne( $query, $field );
       }

       function QY( $queryStr )
       {
              return $this->Query( $queryStr );
       }
       
       function AR()
       {
              return $this->AffectedRows();
       }
} 
?> 
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 4# 大 中 小 发表于 2008-4-2 18:55  
我这个，方法不多，但是够用，没有事务切换的方法： 
复制内容到剪贴板 
代码:
<?php
/**
* 数据库类
*
* Copyright(c) 2005-2008 by 陈毅鑫(深空). All rights reserved
*
* To contact the author write to {@link mailto:[email protected]}
*
* @author 陈毅鑫(深空)
* @version $Id: DB.class.php 50 2008-01-10 20:56:54Z skchen $
* @package 公共组件
*/
abstract class DB {
    const DB_FETCH_ASSOC    = 1;
    const DB_FETCH_ARRAY    = 3;
    const DB_FETCH_ROW      = 2;
    const DB_FETCH_DEFAULT  = self::DB_FETCH_ASSOC;
    public static $db;
    protected static $db_type = array('mysqli' => 'MySQLi', 'oracle' => 'Oracle');
    protected $u_conn;
    protected $q_conn;
    protected $dsn;
    protected $db_key;
    protected $fecth_mode;
    protected $sql;
    protected $sqls;
    protected $qrs;
    protected $urs;
    protected $u_sqls;
    protected $q_sqls;
    protected $query_num;
    protected $update_num;
    public function __construct() {
    }
    public static function &init(& $dsn, $db_key, $fetch_mode = self::DB_FETCH_ASSOC) {
        $key = explode('.', $db_key);
        $key = "['" . implode("']['" , $key) . "']";
        eval('$flag = isset(self::$db' . $key . ');');
        eval("\$db_info = \$dsn" . $key . ";");
        if (!$flag) {
            $class_name = 'DB_' . self::$db_type[strtolower($db_info['db_type'])];
            $obj = new $class_name($db_info, $db_key, $fetch_mode);
            eval('self::$db' . $key . ' =& $obj;');
            unset($obj);
        }
        return self::$db;
    }
    public abstract function connect($type = "slave");
    public abstract function close();
    public abstract function query($sql, $limit = null, $quick = false);
    public abstract function update($sql);
    public abstract function getOne($sql);
    public abstract function getCol($sql, $limit = null);
    public abstract function getRow($sql, $fetch_mode = self::DB_FETCH_DEFAULT);
    public abstract function getAll($sql, $limit = null, $fetch_mode = self::DB_FETCH_DEFAULT);
}
class DB_MySQLi extends DB {
    public function __construct(& $db_info, $db_key, $fetch_mode) {
        $this->db_key = $db_key;
        $this->dsn =& $db_info;
        $this->fecth_mode = $fetch_mode;
    }
    public function connect($type = "slave") {
        if ($type == "master" || !isset($this->dsn["slave"])) {
            $db_host = isset($this->dsn["master"]) ? $this->dsn["master"]["db_host"] : $this->dsn["db_host"];
            $db_name = isset($this->dsn["master"]) ? $this->dsn["master"]["db_name"] : $this->dsn["db_name"];
            $db_user = isset($this->dsn["master"]) ? $this->dsn["master"]["db_user"] : $this->dsn["db_user"];
            $db_pass = isset($this->dsn["master"]) ? $this->dsn["master"]["db_pass"] : $this->dsn["db_pass"];
            $this->u_conn = mysqli_connect($db_host, $db_user, $db_pass);
            if (!$this->u_conn) {
                throw new DB_Exception('更新数据库连接失败');
            }
            if (!mysqli_select_db($this->u_conn, $db_name)) {
                throw new DB_Exception('更新数据库选择失败');
            }
            if (!isset($this->dsn["slave"])) {
                $this->q_conn =& $this->u_conn;
            }
        } else {
            if (empty($this->dsn["slave"])) {
                $this->connect('master');
                return $this->q_conn =& $this->u_conn;
            }
            if (empty($_COOKIE[COOKIE_PREFIX . $this->db_key . '_db_no'])) {
                $db_no = array_rand($this->dsn["slave"]);
                setcookie(COOKIE_PREFIX . $this->db_key . '_db_no', $db_no, null, COOKIE_PATH, COOKIE_DOMAIN);
            } else {
                $db_no = $_COOKIE[COOKIE_PREFIX . $this->db_key . '_db_no'];
            }
            $db_info = $this->dsn["slave"][$db_no];
            $db_host = $db_info["db_host"];
            $db_name = $db_info["db_name"];
            $db_user = $db_info["db_user"];
            $db_pass = $db_info["db_pass"];
            $this->q_conn = mysqli_connect($db_host, $db_user, $db_pass);
            if (!$this->q_conn) {
                if (!$this->u_conn) {
                    $this->connect('slave');
                }
                $this->q_conn =& $this->u_conn;
                if (!$this->q_conn) {
                    throw new DB_Exception('查询数据库连接失败');
                }
            } else {
                if (!mysqli_select_db($this->q_conn, $db_name)) {
                    throw new DB_Exception('查询数据库选择失败');
                }
            }
        }
        return true;
    }
    public function close() {
        if ($this->u_conn === $this->q_conn) {
            if (is_object($this->u_conn)) {
                mysqli_close($this->u_conn);
            }
        } else {
            if (is_object($this->u_conn)) {
                mysqli_close($this->u_conn);
            }
            if (is_object($this->q_conn)) {
                mysqli_close($this->q_conn);
            }
        }
    }
    public function query($sql, $limit = null, $quick = false) {
        if ($limit != null) {
            $sql = $sql . " LIMIT " . $limit;
        }
        $this->sqls[] = $sql;
        $this->q_sqls[] = $sql;
        $this->sql = $sql;
        if (!$this->q_conn) {
            $this->connect("slave");
        }
        $this->qrs = mysqli_query($this->q_conn, $sql, $quick ? MYSQLI_USE_RESULT : MYSQLI_STORE_RESULT);
        if (!$this->qrs) {
            throw new DB_Exception('查询失败:' . mysqli_error($this->q_conn));
        } else {
            $this->query_num++;
            return $this->qrs;
        }
    }
    public function fetch($rs, $fetch_mode = self::DB_FETCH_DEFAULT) {
        switch ($fetch_mode) {
            case 1:
                $fetch_mode = self::DB_FETCH_ASSOC;
                break;
            case 2:
                $fetch_mode = self::DB_FETCH_ROW;
                break;
            case 3:
                $fetch_mode = self::DB_FETCH_ARRAY;
                break;
            default:
                $fetch_mode = self::DB_FETCH_DEFAULT;
                break;
        }
        return mysqli_fetch_array($rs, $fetch_mode);
    }
    public function update($sql) {
        $this->sql = $sql;
        $this->sqls[] = $this->sql;
        $this->u_sqls[] = $this->sql;
        if (!$this->u_conn) {
            $this->connect("master");
        }
        $this->urs = mysqli_query($this->u_conn, $sql, MYSQLI_USE_RESULT);
        if (!$this->urs) {
            throw new DB_Exception('更新失败:' . mysqli_error($this->u_conn));
        } else {
            $this->update_num++;
            return $this->urs;
        }
    }
    public function getOne($sql) {
        if (!$rs = $this->query($sql, 1, true)) {
            return false;
        }
        $row = $this->fetch($rs, self::DB_FETCH_ROW);
        $this->free();
        return $row[0];
    }
    public function getCol($sql, $limit = null) {
        if (!$rs = $this->query($sql, $limit, true)) {
            return false;
        }
        $result = array();
        while ($rows = $this->fetch($rs, self::DB_FETCH_ROW)) {
            $result[] = $rows[0];
        }
        $this->free();
        return $result;
    }
    public function getRow($sql, $fetch_mode = self::DB_FETCH_DEFAULT) {
        if (!$rs = $this->query($sql, 1, true)) {
            return false;
        }
        $row = $this->fetch($rs, $fetch_mode);
        $this->free();
        return $row;
    }
    public function getAll($sql, $limit = null, $fetch_mode = self::DB_FETCH_DEFAULT) {
        if (!$rs = $this->query($sql, $limit, true)) {
            return false;
        }
        $all_rows = array();
        while($rows = $this->fetch($rs, $fetch_mode)) {
            $all_rows[] = $rows;
        }
        $this->free();
        return $all_rows;
    }
    public function rows() {
        return mysqli_num_rows($this->qrs);
    }
    public function lastID() {
        return mysqli_insert_id($this->u_conn);
    }
    public function free() {
        mysqli_free_result($this->qrs);
        $this->qrs = null;
    }
    public function escape($str) {
        return addslashes($str);
    }
    public function __destruct() {
    }
}
class DB_Exception extends Exception {
}
/*
$db = DB::init($configs['db_info'], 'common', 1);
try {
    $rs = $db['common']->query('SELECT * FROM tj_session');
    while ($row = $db['common']->fetch($rs)) {
        $record[] = $row;
    }
} catch (DB_Exception $e) {
    print_r($e);
}
*/
?>