PHP nullable type declaration

Question

Is there any difference between this function in PHP 7.4?

public function foo(string $argumentThatCanBeNull = null) {}

public function bar(?string $argumentThatCanBeNull = null) {}

In PHP 7.4 you don't need `= null`. `?string $argumentThatCanBeNull` is fine. — StackSlave, Jan 19 '21 at 01:42
You need it if you want to pass no parameters to these functions. — Ziarek, Jan 19 '21 at 02:07

Ziarek · Accepted Answer · 2021-01-19T02:09:54.543

1

There is no difference as string is nullable by default.

edited Jan 19 '21 at 02:09

answered Jan 19 '21 at 02:04

Ziarek

1 Answers1