[LightPHP]PHP持久性键值对应储存类|程序设计 - 精英盒子

<?php
/*
**        --键值对应类
**        该类提供了一种键值对应的储存机制，用于保存LightPHP的设置信息，也可供用户使用
**        该类支持数据库和INI文件两种储存方法
*/
class Options
{
    var $_conn=NULL;
    var $_from=NULL;
    var $_safe=1;
    function __construct($tcfgFrom="DEFAULT",$from=NULL,$safe=1)
    {
        $this->_safe=$safe;
        global $cfgFrom;
        $tcfgFrom=strtoupper($tcfgFrom);
        if($tcfgFrom=="DEFAULT")
        {
            $tcfgFrom=$cfgFrom;
        }
        if($tcfgFrom=="DB")
        {
            $this->_conn=new MySQL();
        }
        if($from==NULL)
        {
            global $cfgFromName;
            $from=$cfgFromName;
        }
        $this->_from=$from;
    }
    function __get($kname)
    {
        if($this->_conn)
        {
            $rs=$this->_conn->SQL("SELECT * FROM `{$this->_from}` WHERE `k`='{$kname}'");
            if($rs->getNum())
            {
                $rs->read();
                return $rs->v;
            }
            else
            {
                return NULL;
            }
        }
        else
        {
            $rs=parse_ini_file(dirname(__FILE__)."/../{$this->_from}");
            return str_replace("\\n","\n",$rs[$kname]);
        }
    }
    function __set($kname,$value)
    {
        if($this->_conn)
        {
            $rs=$this->_conn->SQL("SELECT * FROM `{$this->_from}` WHERE `k`='{$kname}'");
            if($rs->getNum())
            {
                $this->_conn->SQL("UPDATE `{$this->_from}` SET `v`='{$value}' WHERE `k`='{$kname}'");
            }
            else
            {
                $this->_conn->SQL("INSERT INTO `{$this->_from}` (`k`,`v`) VALUES('{$kname}','{$value}'");
            }
        }
        else
        {
            $rs=parse_ini_file(dirname(__FILE__)."/../{$this->_from}");
            $rs[$kname]=$value;
            foreach($rs as $k => $v)
            {
                $out="[config]\n";
                $out=$out.$k."=".str_replace("\n","\\n",$v)."\n";
            }
            if($this->_safe)
            {
                $out=";<?php /*\n".$out.";*/ ?>\n";
            }
            file_put_contents(dirname(__FILE__)."/../{$this->_from}",$out);
        }
    }
    function debug()
    {
        print_r($this);
    }
}
?>