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A validator is a computer program used to check the validity or syntactical correctness of a fragment of code or document. The term is commonly used in the  ...

The W3C Markup Validation Service


World Wide Web Consortium validator, maintained at W3C by W3C staff and collaborators. Checks the markup validity of Web documents in HTML, XHTML, ...

validator - npm


Strings only. This library validates and sanitizes strings only. If you're not sure if your input is a string, coerce it using input + '' . Passing anything other than a ...

Validators — WTForms 3.0dev documentation


NOTE this validator used to be called Required but the way it behaved (requiring coerced data, not input data) meant it functioned in a way which was not ...

Feed Validator for Atom and RSS


This is a validator for syndicated feeds. It works with RSS 0.90, 0.91, 0.92, 0.93, 0.94, 1.0, and 2.0. It also validates Atom feeds.

Validation - Laravel - The PHP Framework For Web Artisans


Manually Creating Validators; Form Request Validation. Working With Error Messages. Custom Error Messages. Available Validation Rules; Conditionally ...

Validator | Define Validator at Dictionary.com


Validator definition, to make valid; substantiate; confirm: Time validated our suspicions. See more.

The WDG's Links to Validators - HTML Help by The Web Design Group


The Web Design Group's links to HTML validators and other document checkers.

WDG HTML Validator - HTML Help by The Web Design Group


The WDG Validator will check the syntactical correctness of your HTML to help you produce more accessible Web pages.

Validator, yii\validators\Validator - Yii Framework 2.0 API ...


Validator declares a set of [[builtInValidators|built-in validators] which can be referenced using short names. They are listed as follows: boolean : yii\validators\  ...

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Validators - FormValidation


FormValidation comes with various built-in validators listed in ...

Validators | Django documentation | Django


A validator is a callable that takes a value and raises a ValidationError if it doesn't meet some criteria. Validators can be useful for re-using validation logic ...

Validator – Commons Validator - Apache Commons


Apr 25, 2016 ... Commons Validator. A common issue when receiving data either electronically or from user input is verifying the integrity of the data. This work ...