Using html, php and javascript

Users can register themselves with (Name, Unique Email and Strong password) to the system o mustbevalidatedusingregularexpressionsonthesever,client side is optional) no built-in validation in HTML5 is needed for training purposes o theerrorsshouldbedisplayedonthesamepage,andtheinputs should be re-inserted in the input fields. o Use 1 AJAX to verify if email is already taken or not