Validation is used to check data to make sure it fits whatever required specifications are set for it. Typically Validation is used in checking input data, and in verifying data before storage.

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57 views

Preventing Unvalidated Redirects

I have a project I'm working on, and I recently decided to add a "login bounceback" to my site. The idea is simple, and very common: The user is browsing the site, and runs into something they need to ...
8
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3answers
2k views

input type=“email” allows test@test, why?

I've always been under the assumption that the browser email-validation-regex is more robust than some regex pattern in JS/PHP. My employer just showed me that both strings are considered correct (at ...
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2answers
41 views

How do I validate IP Address ownership for authentication?

I have a website where digital content is behind a paywall. We verify users have access by IP address. Our customers are all large companies, with static IP addresses. So, if a user is within the ...
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2answers
193 views

Form validation - security and input specification

So I'm working on a register form and I have four fields: name, username, email and password. I pick up the values of these fields in jQuery and depending on if all the fields are filled, I pass them ...
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1answer
16 views

When can I remove directory validation script?

When I apply to add my website to a directory, it asks to add some script to my homepage or index page to validate the website. At what point can I remove this script? I want to add my site to various ...
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1answer
223 views

Browsers treat vertical tab characters in input type=text differently. Is one of them correct?

In developing some server side validation I discovered that (the latest Windows versions as of this writing of) Firefox, Chrome and Internet Explorer handle vertical tab characters differently in ...
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1answer
118 views

Pages wrapped in a form element. What effect would this have on SEO or other machine-readability?

I'm helping somebody with a site and I've noticed that all the main pages are wrapped inside a form. I mean: <body> <form> [ everything in the page ] </form> </body> ...
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1answer
110 views

New to website form validation

I'm new to form validation and I have been lucky over the years. I would like to update my method of form creation in my sites. I was curious to know what is standard and if there is a preexisting ...
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2answers
912 views

Schema.org, HTML5 and the datetime format: how do I get it to validate?

Schema.org says this, The opening hours for a business. Opening hours can be specified as a weekly time range, starting with days, then times per day. Multiple days can be listed with commas ',' ...
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2answers
458 views

Is <a href=“#”>link</a> a broken link?

When using empty URL fragment links, to send a user to the top of the page (e.g. <a href="#">return to top</a>), are these links considered broken or invalid? One of my tools is returning ...
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2answers
281 views

Invalid Google markup rel=publisher

Why is Google publisher HTML tag invalid according to W3C specification? Is there any way to correct this example: <a href="http://plus.google.com/109469573972649651137?prsrc=3" rel="publisher" ...
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1answer
230 views

PHP W3 Validator API, Is this good? [closed]

I was trying to find a way to see if my site's code was valid or not but I continuously going over to W3 Validator so I decided to make an "API" however it really isn't! I just wanted to know if ...
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0answers
27 views

Validation Meta tag for Bing [duplicate]

Possible Duplicate: Validation Meta tags for search engines Should validation meta tag for the Bing search engine be left on the site following validation?
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1answer
2k views

Fixing validator error “cannot generate system identifier for general entity”

The W3C validator shows a "cannot generate system identifier for general entity" error when attempting to validate a page that contains the following code: <script type="text/javascript" ...
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2answers
1k views

OpenGraph tags and HTML5 validity

I have a HTML5 based page, and I inculded the OpenGraph tags according to it's documentation. Also I checked with Facebook Debug, and it can parse the metadata. But when I use W3C Validator, it ...
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1answer
146 views

Google Optimizer code, validation and cdata

I ran my site through the W3C validator, and a bunch of errors were caused by the Google Website Optimizer javascript. It seems weird that would happen. If I put CDATA around it, the error go away. I ...
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3answers
125 views

Email validation tool to check someone works at an organisation

I am setting up a tool that allows users to claim a company profile and am wondering if there is an automated way to validate that the email they enter actually belongs to the organisation Eg If User ...
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3answers
591 views

Validation Meta tags for search engines

Should validation meta tags for search engines be left on the site following validation? For example, should I leave my msvalidate meta tag after I've validated the site.
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1answer
202 views

HTML encoding in the alt attribute

Why is it that &#187; valid for an alt atribute but &raquo; is not?
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1answer
146 views

What are the most common “normal” HTML errors? [closed]

I'm trying to find real-world HTML pages that are actually valid (in the sense that they are displayed by modern browsers), but are not compliant with HTML specification and are considered invalid. ...
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4answers
1k views

Does valid HTML, CSS and/or XML affect SEO?

Can a page's HTML validity affect search engine optimization (SEO)? Assuming all other factors are exactly equal, will an HTML document with 0 errors and 0 warnings (W3C provides a tool to validate ...
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1answer
56 views

Checking correctness of site

I am looking for a way to thoroughly check my site against common errors (like 404 links, duplicated title tags and so on). I'd like to define some custom rules too, for example: We changed name of ...
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1answer
62 views

Problematic using Captcha on billing page

I have simple captcha on user page. I want make it refresh if user input incorrect captcha, I just wanna ask Should I do it or I just add a simple button to refresh it.
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4answers
870 views

CSS3 Validation: Is it worth it?

I'm currently building a project, and I'm writing the site using HTML5 and CSS3. I have validated the HTML and it passed first time (very pleased as it was my first time coding HTML5!). And then I ...
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2answers
649 views

Yahoo sitemap validation

I am trying to submit sitemap.xml (Index) to Yahoo Site Explorer but with no luck. I tried using website feed option in the site explorer to submit the sitemap, but I got validation errors. However, ...
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2answers
297 views

Validating sitemaps with images tag

I am trying to add the <image> tag to my sitemap, but even trying to look at the XSD , as mentioned by Google at http://www.google.com/support/webmasters/bin/answer.py?answer=183668 , I get 404 ...
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1answer
5k views

How can I resolve HTML validation errors when using Facebook Comments?

I am trying to validate my document that has the following facebook comments tag <fb:comments width="425"></fb:comments> I am getting validation error: Line 333, Column 45: Element ...
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2answers
268 views

Link of image and text

I am currently linking related and text (caption) in the following way: <a href="/link"><img src="image.jpg" ... />This is caption</a> Meaning I combine both and text inside the ...
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2answers
263 views

Localized CAPTCHA

What are effective CAPTCHA solutions that can have localized description, and CAPTCHA text itself is either language-neutral, or can be localized (for Polish language)? It is to be used to protect a ...
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2answers
2k views

Is JavaScript or Flash able to extract the MAC address from a browser?

MAC address = Media Access Control address Believe I saw that this was possible somewhere, but now that I'm looking for it I can't find the implementation.
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3answers
871 views

Is it possible to confirm a person's name without a creditcard number?

Looking for a way to confirm user supplied names without asking for a creditcard number. Requirements: Method must be automated, and not require manual processing, Work 80% of the time or more. Be ...
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4answers
3k views

Linux HTML/XML W3C Validation Utilities

What programs can I use to validate HTML/XML markup? Basically, I want a local, command-line based, version of W3C HTML validation service (like lint) that I can use for detecting errors. Update I ...
15
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5answers
6k views

How can I validate HTML offline?

When I'm developing a website locally sometimes I want to check if the html is valid but I haven't been able to find a good tool. I want it partial as a sanity check when I'm troubleshooting layout ...
44
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16answers
2k views

HTML validation: is it worth it?

What are the advantages and disadvantages (if any) of making sure that all pages validate compared to having non-valid HTML that however works on all major browsers? Also, is having valid HTML after ...
15
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8answers
416 views

Effective captcha solutions [duplicate]

Possible Duplicate: How can I prevent spam on sites which I control? ReCaptcha is all the rage at the moment, Based on customer/user feedback, what other captcha or general human ...