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php留言板的设计构思

May 25, 2016 pm 04:56 PM
select textarea Drop-down menu Pagination Single box

本文章不讲代码只讲关于php留言板的设计构思与中间用到那些技术处理,有需要的朋友可以参考一下。

-设计一个程序流程
       1.功能需要
       2.页面设计
       3.数据库设计
       4.代码设计
       5.调试发布
   -表单
       1.form>
       2.method:表单数据传输到服务器的方法
          post(表示在Http请求中嵌入表单数据)
          get   (表示将表单数据附加到请求该页的URL)  默认方法
          区别:
          a.Get传输数据量小,这主要是受URL长度限制;而Post可以传输大量数据。
          b.Get安全性比较低,但执行效率比Post好。      
          接收参数:
          POST方式:$_POST['name']
          GET方式:$_GET['name']
          注意:$_POST与$_GET必须为大写;
                     php5.0以上版本不加引号会报notice级别错误,要养成良好书写习惯,规范化。当然关闭display_error就另当别论。
         充电
          $_POST:它是由HTTP POST方法传递的变量组成的数组
          $_GET: 它是由HTTP GET方法传递的变量组成的数组
          $_COOKIE:它是由HTTP Cookies传递的变量组成的数组
          $_SESSION:它是包含当前脚本中会话变量的数组
          建议
          1.GET安全性较POST差,包含机密信息的话建议使用POST
          2.分页时使用GET
       3.常用控件
           a.单行文本框  
               多行文本框 
           b.密码框  
           c.多选框   (checked属性表示选中状态)
           d.单选框   (checked同上)
           e.下拉菜单
              
            f.提交按钮
              重置按钮 
        4.日期/时间函数
            php:date,time;
            mysql:now
   -javascript验证
       onsubmit:当提交按钮点击时触动,如果内容为"return function_name();"函数返回FALSE,则不提交表单。
   -初识COOKIE
        setcookie(name,value,time);
        注意:php的cookie必须刷新一次才能生效。



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