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<?php class A { function foo(array $a = NULL) {} } class B extends A { function foo(?array $a = NULL) {} } class C extends B { function foo(array $a = NULL) {} }
Output for git.master_jit, git.master
Deprecated: A::foo(): Implicitly marking parameter $a as nullable is deprecated, the explicit nullable type must be used instead in /in/CYFMS on line 4 Deprecated: C::foo(): Implicitly marking parameter $a as nullable is deprecated, the explicit nullable type must be used instead in /in/CYFMS on line 10

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