php MYSQL数据操作类

mysql 数据库操作类，分享给大家

[php]

/**
 *db.class.php create databse object
 *
 *@author Dick 417@668x.net
 *@copyright http://blog.csdn.net/haibrother
 *
 **/ 
 
class Dick_Db{ 
    public  $db_host        = ''; //主机地址  
    public  $db_username    = ''; //数据库帐号  
    public  $db_password    = ''; //数据库密码  
    public  $db_name        = ''; //数据库名  
    public  $link           = ''; //数据库连接对象  
    public  $debug          = 1; //是否开启debug调试，默认是开启的  
    public  $pconnect       = 0; //是否开启长连接，默认是关闭的  
    public  $log_file       = 'log/';//日志文件目录  
 
    /**
     *初始化信息
     *@param object
     **/ 
    public function __construct($config=''){ 
        if(!is_object($config)){ 
            $this->halt('database config is not wrong,please check it!'); 
        } 
        if(!empty($config)){ 
            $this->db_host     = $config->host; 
            $this->db_username = $config->username; 
            $this->db_password = $config->password; 
            $this->db_name     = $config->dbname;        
        } 
        $this->connect(); 
    } 
     
    /**
     * 获取链接
     * */ 
     public function connect(){ 
         $connect = $this->pconnect === 1?'mysql_pconnect':'mysql_connect'; 
         if(!$this->link = @$connect($this->db_host,$this->db_username,$this->db_password)){ 
            $this->halt('Database cant not connect!'); 
         } 
          mysql_set_charset('utf8',$this->link); 
          mysql_select_db($this->db_name,$this->link); 
     } 
 
 
     /**
      *query
      *@param string $sql
      *return boolean 
      **/ 
     public function query($sql){ 
        if(!$query = mysql_query($sql,$this->link)){ 
             $message = date('Y-m-d H:i:s').'  '.$sql; 
             $this-> write_log($message); 
             $this->halt('SQL error,please check it!',$sql); 
        } 
        return $query; 
     } 
 
     /**
      *
      *@param string $sql
      *@param string $type
      * mysql_fetch_assoc  mysql_fetch_array  mysql_fetch_row  mysql_affected_rows
      *@return array
      */ 
     public function fetch($sql,$type='assoc'){ 
        $fetch_type = 'mysql_fetch_'.$type; 
        $query = $this->query($sql); 
        $result = $fetch_type($query); 
        $this->free_result($query); 
        $this->close(); 
        return $result; 
     } 
 
     /**
      *@param string $sql
      *@return array
      **/ 
     public function dickFetch($sql,$type='assoc'){ 
        $fetch_type = 'mysql_fetch_'.$type; 
        $query = $this->query($sql); 
        $rows=array(); 
        while ($row=$fetch_type($query)) { 
            $rows[]=$row; 
        } 
        $this->free_result($query); 
        $this->close(); 
        return $rows; 
     } 
 
     /**
      *取得insert 最后一次的ID
      *@param string $sql
      **/ 
     public function insert_id(){ 
        return mysql_insert_id($this->link); 
     } 
 
     /**
      *释放数据库对象资源
      **/ 
     public function free_result($query){ 
        return mysql_free_result($query); 
     } 
 
 
     /**
      *关闭数据库连接
      **/ 
     public function close(){ 
        if($this->pconnect === 0) return mysql_close($this->link); 
     } 
      
 
 
    /**
     * 整数安全处理，仅返回大于等于0的整数
     *@param int
     *@return int
     * */ 
    public function numeric(& $variint){ 
        if (!isset ($variint)) 
            return 0; 
        if (!is_numeric($variint)) 
            return 0; 
 
        //首字符0处理  
        $str_len = strlen($variint); 
        for ($i = 0; $i             if ($variint[$i] != '0') 
                break; 
        } 
        if ($i > 0 && $variint > 0) { 
            $variint = substr($variint, $i, $str_len); 
            $str_len = strlen($variint); 
        } 
 
        //数字安全处理  
        if ($str_len > 0) { 
            if (!preg_match("/^[0-9]+$/", $variint)) { 
                return 0; 
            } else { 
                $variint = substr($variint, 0, 10); 
                //兼容MYSQL中INT无符号最大值4294967295  
                $variint = ($variint > 4294967295) ? 4294967295 : $variint; 
                return $variint; 
            } 
        } else { 
            return 0; 
        } 
    } 
 
    /**
     *返回mysql error
     **/ 
    public function error() { 
        return (($this->link) ? mysql_error($this->link) : mysql_error()); 
    } 
 
 
    /**
     *返回mysql errno
     **/ 
    public function errno() { 
        return intval(($this->link) ? mysql_errno($this->link) : mysql_errno()); 
    } 
 
    /**
     *写入SQL错误日志
     *@param string
     *@param string type
     **/ 
    public function write_log($message='',$type='date'){ 
        if(empty($message))return false; 
        if(!in_array($type, array('date','month')))return false; 
        if(!is_dir($this->log_file)){ 
            mkdir($this->log_file); 
        } 
        switch ($type) { 
            case 'month': 
                $file = $this->log_file.date('Y-m').'.log'; 
                break; 
             
            default: 
                $file = $this->log_file.date('Y-m-d').'.log'; 
                break; 
        } 
        if(!file_exists($file)){ 
            file_put_contents($file,''); 
        } 
        if(!is_readable($file)){ 
            $this->halt($file.'- 系统无权限读操作！');    
        } 
        if(!is_writable($file)){ 
            $this->halt($file.'- 系统无权限写操作！'); 
        } 
        $contents = file_get_contents($file); 
        $add_message = '  -Error:'.$this->error().'   -Errno:'.$this->errno(); 
        file_put_contents($file, $contents.$message.$add_message."\n"); 
         
    } 
 
 
    /**
      *终止程序
      *@param str $message
      *@return print
      **/ 
     public function halt($message='',$sql=''){ 
        if($this->debug===1){ 
            $error_get_last = error_get_last(); 
            if($message) { 
                $errmsg = "System info: $message\n\n"; 
            } 
            $errmsg .= "Time: ".date('Y-m-d H:i:s')."\n"; 
            $errmsg .= "Script: ".$error_get_last['file']."\n\n"; 
            if($sql) { 
                $errmsg .= "SQL: ".htmlspecialchars($sql)."\n"; 
            } 
            $errmsg .= "Error:  ".$this->error()."\n"; 
            $errmsg .= "Errno.:  ".$this->errno(); 
 
            echo "\n"; 
            echo "

"; 
            echo nl2br($errmsg); 
            exit(); 
        } 
         
     } 
 
     /**
      *程序测试打印
      *@param string
      *@return print
      **/ 
     public function prf($param){ 
        echo '

'; <br>
        print_r($param); <br>
        echo '