Home Backend Development PHP Tutorial 前端验证有什么用?用户可以透过浏览器修改表单隐藏域的值再提交

前端验证有什么用?用户可以透过浏览器修改表单隐藏域的值再提交

Jun 13, 2016 pm 12:08 PM
css html js nbsp ps

前端验证有什么用?用户可以通过浏览器修改表单隐藏域的值再提交?


如图,用户可以通过浏览器很方便的修改表单的值、让隐藏的区块显示出来。。。

有时候前端会根据传来的不同的值显示不同的表单项、或者使用隐藏域记录一些关键值(比如修改一条信息时隐藏域记录该信息的ID,提交后根据这个ID做数据更新)等等

可用户一旦修改这些值,再提交,那不就出乱子了?

所以在提交数据后还必须经过非常严谨的判断才能做更新吗?

PS:我一直以为用户是只能查看前端的HTML\JS\CSS,没想带还可以直接修改!?
------解决思路----------------------
虽然你可以用隐藏域修改一些值,但你能确定你的修改是正确的吗?

盲目的相信传入的数据,是安全大忌

隐藏域的值只是为了验证方便
------解决思路----------------------
当然了 ,无论你在前端怎么修改JS判断啊,修改HTML表单信息啊,到后台的话都会用后台脚本语言再次进行判断的。因为前段的一切工作只是防范君子,不防小人啊,像那个隐藏的表单应该是做JS表单验证用的,为了是给更好的用户体验,实际上应该是不传入数据库的,总结一些就是前端做完判断之后,在存入数据库之前还是要判断的。

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Table Border in HTML Table Border in HTML Sep 04, 2024 pm 04:49 PM

Guide to Table Border in HTML. Here we discuss multiple ways for defining table-border with examples of the Table Border in HTML.

Nested Table in HTML Nested Table in HTML Sep 04, 2024 pm 04:49 PM

This is a guide to Nested Table in HTML. Here we discuss how to create a table within the table along with the respective examples.

HTML margin-left HTML margin-left Sep 04, 2024 pm 04:48 PM

Guide to HTML margin-left. Here we discuss a brief overview on HTML margin-left and its Examples along with its Code Implementation.

HTML Table Layout HTML Table Layout Sep 04, 2024 pm 04:54 PM

Guide to HTML Table Layout. Here we discuss the Values of HTML Table Layout along with the examples and outputs n detail.

Moving Text in HTML Moving Text in HTML Sep 04, 2024 pm 04:45 PM

Guide to Moving Text in HTML. Here we discuss an introduction, how marquee tag work with syntax and examples to implement.

HTML Ordered List HTML Ordered List Sep 04, 2024 pm 04:43 PM

Guide to the HTML Ordered List. Here we also discuss introduction of HTML Ordered list and types along with their example respectively

How do you parse and process HTML/XML in PHP? How do you parse and process HTML/XML in PHP? Feb 07, 2025 am 11:57 AM

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

HTML onclick Button HTML onclick Button Sep 04, 2024 pm 04:49 PM

Guide to HTML onclick Button. Here we discuss their introduction, working, examples and onclick Event in various events respectively.

See all articles