Let's say I want to set up a sandbox or playground in PHP that users can use to create (or paste in) XML and XSLT, then transform the XML via the XSLT (by means of PHP 5's DOMDocument and related ...
If an XML document is not validated as “Well Formed” or checked against a schema, what are the risks?
When processing an XML document in my application, what are the risks? E.g. if it is not "Well Formed" or is not checked against a schema.