php如何更好更有效的实现-----用户注册页面
页面|用户注册
当程序员的人应该都去过论坛,都在应该注册过论坛的用户吧.论坛上用户注册的步骤分为几部:
第一步 \ 协议页面, 只有同意这个协议才可以进入下一步注册
第二步 \ 表单输入页面, 输入用户的注册信息
第三步 \ 注册结果页面,提示注册成功
在实际工作中,如果我们要开发实现这种注册页面,要注意很多的问题:
1\用户跳过"第一步",没有阅读协议页面,直接通过第二步的url直接访问表单输入页面.
2\用户在完成"第三步"的时候,不停的刷新页面,这个用户输入的信息就在每刷新一次的时候被重新保存一次
3\用户在完成"第三步"的时候,点击后退,修改某个信息后,再次提交.
类似这种得表单在web开发的过程中会经常碰到, 对于第3点, 几乎目前所有的论坛中都有这个问题存在,;第2点在一些留言板中经常遇到, 但是怎么作才可以避免上述的问题呢?
今天老板让我帮别人做个文件上传的东西, 允许任何人来上传符合要求文件, 页面模板已经设计好了, 就是和用户注册的步骤是一样的, 分三步骤. 以前做过类似的东西, 但是防刷新机制设计的不是很好. 反正今天没事做, 就稍微研究一下, 看看如何实现代码可以避免上述的问题.
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下面是个人设计的实现代码,可以避免上述的问题. 通过浏览器访问register.php,在输入"用户名"和"地址"的时候, 两个都不能为空,为空的时候,会提示错误信息; 当两个输入框都不为空的时候, 可以提交成功,提交成功以后,你再进行刷新和后退,看看是不是达到了效果了.
文件一: config.inc.php
//开始session
session_start();
//设置不进行本地缓存
header('Expires: '.date('D,d M Y H:i:s',mktime(0,0,0,1,1,2000)).' GMT');
header('Last-Modified:'.gmdate('D,d M Y H:i:s').' GMT');
header('Cache-control: private, no-cache,must-revalidate');
header('Pragma: no-cache');
?>
文件二: register.php
require_once "config.inc.php";
if(isset($_SESSION[step2]) && isset($_POST[step2])) {
//注册的最后一步
$errorStr = formStep3();
if($errorStr!=null){
require_once('step2.html');
}else{
require_once('step3.html');
unset($_SESSION[step2], $_SESSION[step1]);
}
} else if(isset($_SESSION[step1]) && isset($_GET[step1])) {
//注册的第二步
require_once('step2.html');
$_SESSION[step2] = 1;
} else {
//注册的第一步
require_once('step1.html');
$_SESSION[step1] = 1;
}
//判断用户提交的表单的数据的 准确性 和 保存提交数据 的函数
function formStep3(){
$errors = array();
$errorStr = null;
if(strlen($_POST[username]) if(strlen($_POST[address])
if(sizeof($errors)>0){
$errorStr .= "
";
$errorStr .= "信息输入错误:";
foreach($errors as $error)
$errorStr .= "
$errorStr .= "
";
}else{
//用来保存用户输入的信息到数据库或其他地方
//这个保存的过程就略了
}
return $errorStr;
}
?>
模板文件一: step1.html
步骤一 阅读《章程》
模板文件二: step2.html
步骤二 提交登记表
模板文件三: step3.html
步骤三 提交成功

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