Say you want to modify one of the validation rules, the best way would be to create a method with a same name and load it after the original method.This way, all calls would be redirected to your method instead of the original.The userinfo part of a URL is made of the username and/or the password.They are optional and used for authentication purposes.This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, Math ML, etc.If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, Mobile OK content, or to find broken links, there are other validators and tools available.The authority of a URL is made of the userinfo, the hostname and the port. When the port is not present, a default port for the specific scheme is assumed. Example of usage: Construct a Url Validator with valid schemes of "http", and "https". Url Validator url Validator = new Url Validator(schemes); if (url Valid("ftp://com/")) else prints "url is invalid" If instead the default constructor is used.
Uniform Resource Identifiers (URIs) are used to identify 'names' or 'resources'. Just think of a URL as an address to a resource, and the scheme as a specification of how to get there.
You can change the error message that contributors will receive when they do not pass, and you can also change the value that will pass the validation.
Utilizing this functionality will save you time, ensure that contributors are completing the task as you envisioned, and provide further instruction if they are completing the task incorrectly.
Magento uses Prototype library to manage form validation.
This comes in handy, because all you need to do when writing custom form is to assign a valid class names to your input fields, and pass the form id to Varien Form object.