In php difference between != and <>

Question

Both are not equal then what is their use

Answer 1

<> and !=are just synonyms. That means they are completely interchangeable. The history of php is a bit wild, so naming conventions, even to the point of how operators are to be called, were and still are not really unified.
In conclusion, one's old and one's new.

Answer 2

Lord Zilla thnks