The usage for this class is pretty simple as well, requiring you pass in the XSD schemas and then call Is Valid specifying the XML file to validate.
It’s 2017 and you still prefer using XML(Extensible Markup Language) to JSON(Java Script Object Notation) for data-interchange? Everything you want to say about the trade-offs of either of them has been dealt with here.
All three provide identical APIs in lxml, represented by validator classes with the obvious names.
Writing a XSD for your XML is actually easy to do, you make use of tools like freeformatter or do a crash course on w3Schools.
Now, we are ready to validate our XML file against the XSD using either DOMDocument or XMLReader.
First, make sure that these extensions are enabled on PHP installation.
The DTD is retrieved automatically based on the DOCTYPE of the parsed document.
All you have to do is use a parser that has DTD validation enabled: option, which loads the DTD and weaves attribute default values into the document.