The various child elements of a If the documents are being validated for wellformedness only: Sets, whether the parser should be validating.(In other words: Whether documents must contain a document type or xml schema declaration.) The property is ignored otherwise. Note that errors of well-formedness (such as mismatched start and end tags), if such exist, are displayed prior to validation errors being displayed.So the button will be enabled only when a validation error is reached (that is, after alll well-formedness errors have been corrected).Otherwise, a message that describes the error is displayed.
Quick Tip: Both the XPath and XQuery Match assertions make use of the Saxon XPath / XQuery processor which supports most of the latest standards in this area.command enables you to validate XML documents against DTDs, XML Schemas, and other schemas.Validation is automatically carried out when you switch from Text View to any other view.First, make sure that these extensions are enabled on PHP installation.The above piece of code is actually easy to understand, the most important method here is the validate Feeds() method.