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 [email protected]
 *@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 < $str_len; $i++) {
            if ($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 = "<b>System info</b>: $message\n\n";
            }
            $errmsg .= "<b>Time</b>: ".date('Y-m-d H:i:s')."\n";
            $errmsg .= "<b>Script</b>: ".$error_get_last['file']."\n\n";
            if($sql) {
                $errmsg .= "<b>SQL</b>: ".htmlspecialchars($sql)."\n";
            }
            $errmsg .= "<b>Error</b>:  ".$this->error()."\n";
            $errmsg .= "<b>Errno.</b>:  ".$this->errno();

            echo "</table></table></table></table></table>\n";
            echo "<p style=\"font-family: Verdana, Tahoma; font-size: 11px; background: #FFFFFF;\">";
            echo nl2br($errmsg);
            exit();
     	}
        
     }

     /**
      *程序测试打印
      *@param string
      *@return print
      **/
     public function prf($param){
        echo '<pre>';
        print_r($param);
        echo '</pre>';
        exit;
     }


}
#################################################
####测试程序
####
##################################################
error_reporting(E_ALL);
header('Content-type:text/html;charset=utf-8');
date_default_timezone_set('Asia/Shanghai');
$config = array(
    'host'     => '192.168.2.1',
    'username' => 'root',
    'password' => '',
    'dbname'   => 'test',
    );
$db = new Dick_Db((object)$config);
$db     ->pconnect = 1;
$sql = 'SELECT * FROM t1';
$db->prf($db->dickFetch($sql));

?>