php 模拟 asp.net webFrom 按钮提交事件的思路及代码

<?
require_once '../inc/eventhelper.php';

function page_load()
{
    echo '在任何时候都会运行<br>';

    if(!page::ispostback())
    {
        echo '加载产品分类<br>';
        if($_get['cmd']=='edit')   
        {
            echo '修改加载需要修改的产品信息<br>';
        }
    }
}

function badd_click()
{
    //comm::checkqx('产品管理_添加');
    echo "badd_click<br>";
}

function bedit_click()
{
    //comm::checkqx('产品管理_修改');
    echo 'proid='.$_get['proid'].'<br>';
    echo "bedit_click<br>";
}

function sdfsdfdsf_click()
{
    echo "e44444444444444444444<br>";
}

?>

<form name="aa" method="post" action="?<?=comm::getparam()?>">
    <input type="submit" name="badd" value="添加" />
    <input type="submit" name="bedit" value="修改" />
    <input type="submit" name="sdfsdfdsf" value="ewrewrewr" />
</form>

<?
    class page
    {
        //是否回发数据，1:是
        public static function ispostback()
        {
            global $sysruneventname;
            return !empty($sysruneventname);
        }

        //加载并执行事件
        function eventload()
        {
            global $sysruneventname;

            $arrevent=get_defined_functions();
            $arreventuser=$arrevent['user'];

            $arr=array_keys($_post);
            foreach($arr as $row)
            {
                $name=strtolower($row);
                foreach($arreventuser as $row1)
                {
                    $name1=str_ireplace('_click','',$row1);
                    if($name==$name1)
                    {
                        $sysruneventname=$row1;
                        break;
                    }
                }

                if(!empty($sysruneventname))
                {
                    break;   
                }
            }

            if(function_exists('page_load'))
                page_load();

            $sysruneventrunname=strtolower($sysruneventname);

            if(page::ispostback())
            {
                $sysruneventname();
            }
        }
    }

    class comm
    {
        public static function getparam($params=array(),$cmd='addoverride')
        {
            $allparam=array();

            if($cmd=='addoverride')
            {
                $arrkeys=array_keys($params);
                foreach($arrkeys as $row)
                {
                    if(!in_array($row,array_keys($allparam)))
                        $allparam[$row]=$params[$row];
                }
            }
            else if($cmd=='del')
            {
                foreach($params as $row)
                {
                    unset($_get[$row]);
                }
            }

           
            $arrkeys=array_keys($_get);
            foreach($arrkeys as $row)
            {
                if(!in_array($row,array_keys($allparam)))
                    $allparam[$row]=$_get[$row];
            }

            $p='';
            $arrkeys=array_keys($allparam);
            foreach($arrkeys as $row)
            {
                $p.=$row.'='.$allparam[$row].'&';
            }
            return rtrim($p,'&');
        }
    }

    page::eventload();
?>