Admission as a PhD student follows an application to the Faculty concerned. Individual Faculties' PhD websites give the procedures and deadlines for applications.
The emphasis is on the applicant's academic qualifications, the nature of research projects and how these can be included in the research plans of the academic environment concerned and whether the requisite resources are available, including the supervisory capacity, for the studies to be undertaken.
It is essential for study funding to be in place since admission requires the University to make the requisite resources available for studies to be properly undertaken.
We advise contacting the academic environment concerned to discuss your research project and study options before completing and submitting an application for admission. It is possible and often a good idea to submit an application for admission at the same time as applying for a research grant. We know from experience that drawing up a good application is a relatively big, time-consuming task.