1、提交按钮置disabled
当用户提交后,立即把按钮置为不可用状态。这种用js来实现。
提交前
复制代码 代码如下:
$("#submit").attr('disabled','true');
$("#submit").val("正在提交,请稍等");
....................................................................................
执行后,把按钮置为原来状态
复制代码 代码如下:
$('#submit ').removeAttr('disabled');
$("#submit ").val("确定提交");
2、过期时间法
思路:当用户提交按钮后生成一个token(每次业务提交token 为唯一值)存入session,并设置过期时间。当用户再此提交时,检测token是否一致且是否过期,若一致且没有过期,则认为提交了二次。当程序执行出错的时候,则需要清除存入session的值。见下面程序
复制代码 代码如下:
function checkRepeatSubmit($uniqueid = '', $expire = 30) {
$uniqueid = empty($uniqueid) ? Yii::app()->user->id . Yii::app()->user->name . Yii::app()->user->mihome : $uniqueid;
$token = md5("wms_check_repeat" . $uniqueid);
$time = time();
if (isset($_SESSION['token']) && !empty($_SESSION['token']) && $_SESSION['token'] == $token && ($time - $_SESSION['expire_time']
return false;
} else {
$_SESSION['token'] = $token;
$_SESSION['expire_time'] = $time;
//session写入的时候会等待整个页面加载完成,用此函数可以立即写入
session_write_close();
return true;
}
}
//删除存入的值
function cancelRepeatSubmit() {
unset($_SESSION['token']);
unset($_SESSION['expire_time']);
}
3、token销毁法
思路:当页面进行加装的时候生成token,存在session中,并写在表单里。表单提交的时候随表单提交给服务端,服务端通过session存入的token与token进行比较,若相等,则销毁seesion中存入的token,当页面遭到二次提交的时候,由于存入session中的token不存在而报错。下面是代码
复制代码 代码如下:
/**
* 第二种方案
* 1、产生token,并存在session中
* 2、随页面生成
* 3、提交页面与session进行比对,成功后对session进行销毁
* 4、第二次提交则不存在这个值而报错
* @param type $uniqueid
* @return type
*/
function createToken($uniqueid) {
$uniqueid = empty($uniqueid) ? Yii::app()->user->id . Yii::app()->user->name . Yii::app()->user->mihome : $uniqueid;
$token = md5("wms_check2_repeat" . $uniqueid);
$_SESSION['form_token'] = $token;
session_write_close();
return $token;
}
function checkToken($token) {
if (!isset($_SESSION['form_token']) || empty($_SESSION['form_token']) || $_SESSION['form_token'] != $token) {
return false;
} else {
unset($_SESSION['form_token']);
return true;
}
}
上面总结了三种方法,个人感觉第一种跟第二种方法配合着用会达到更好的效果。第二种方法与第三种方法个人感觉第三种要有优势点。
第二种与第三种方法都是把token写在session中,这种方法好处是节省存储空间,但坏处是由于session是需要整个页面加载完毕才能写入,故当整个页面加载比较慢,且用户点击多次提交,可能由于session还没写入导致系统还认为是第一次输入。导致验证不起作用。好在php函数提供了一个牛逼的函数。 session_write_close(),可以立即把session写入,不用等待页面加载完成。同事对于session的存入也有很多种方法可以选择,可以存在redis,memcache或者数据库都可以的。

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

SublimeText3 Chinese version
Chinese version, very easy to use

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

Atom editor mac version download
The most popular open source editor

Zend Studio 13.0.1
Powerful PHP integrated development environment