The Dravidian University is a state university recognized by the University Grants Commission (UGC). However, the validity of a PhD degree awarded by Dravidian University may vary depending on the institution you are attempting to apply to or the country you are located in. Some institutions or countries may require additional evaluation or verification of the degree's credibility.
I recommend checking with the specific institution or authority where you intend to use the PhD degree for their requirements and acceptance criteria. They will be able to provide the most accurate and up-to-date information regarding the validity of the degree for their purposes.