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HomeBackend DevelopmentPHP Tutorialphp 模拟 asp.net webFrom 按钮提交事件的思路及代码_php技巧

由于公司需要php方面的项目开发,php刚刚入门,在写按钮提交过程中,asp.net里的按钮事件更好些。先看下面的代码,

复制代码 代码如下:


require_once '../inc/EventHelper.php';

function Page_Load()
{
    echo '在任何时候都会运行
';

    if(!Page::IsPostBack())
    {
        echo '加载产品分类
';
        if($_GET['cmd']=='edit')   
        {
            echo '修改加载需要修改的产品信息
';
        }
    }
}

function bAdd_Click()
{
    //Comm::CheckQX('产品管理_添加');
    echo "bAdd_Click
";
}

function bEdit_Click()
{
    //Comm::CheckQX('产品管理_修改');
    echo 'proID='.$_GET['proID'].'
';
    echo "bEdit_Click
";
}

function sdfsdfdsf_Click()
{
    echo "e44444444444444444444
";
}

?>


   
   
   

做过asp.net开发的对上面的代码应该有点熟悉,如:Page_Load,Page.IsPostback,bAdd_Click,这些很像asp.net的事件。

以上代码在点击【添加】按钮时运行bAdd_Click函数(暂且这么叫,function好像是函数的意思),同样的,点击【修改】按钮自动运行bEdit_Click事件。不需要过多的参数变化,也不需要过多的文件,若页面功能不是很复杂的情况下,用这种模式可以快速开发。

下面来看看EventHelper.php这个文件的代码:

复制代码 代码如下:


    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();
?>

以上功能大家可以测试下,在我php5.4可以运行成功,不过在安全性方面还没考虑过多,看过一些文章php会有可能通过客户端执行php代码,因为php很许多实用的功能特性。

关于Comm::GetParam,由于经常需要获取get方式的参数,或修改参数,如分页时需要保留所有url参数,只修改分页参数(如page=5),所以就自行写了一些代码。

主要利用php以下几个特点:

function_exists
get_defined_functions

以及利用常用的表单提交原理,利用submit提交原理 实现功能的。

由于时间仓促,来不及说明具体原理,还请见谅,代码大家都可以看懂的。

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