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<?php class A { function bb() { echo 'parent-'; } } trait B { function bb() { echo 'trait-'; parent::bb(); } } class C extends A { use B; function bb() { echo 'class-'; B::bb(); parent::bb(); } } $o=new C; $o->bb();
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
class- Deprecated: Calling static trait method B::bb is deprecated, it should only be called on a class using the trait in /in/pWAfW on line 20 Fatal error: Uncaught Error: Non-static method B::bb() cannot be called statically in /in/pWAfW:20 Stack trace: #0 /in/pWAfW(26): C->bb() #1 {main} thrown in /in/pWAfW on line 20
Process exited with code 255.
Output for 8.0.0 - 8.0.30
class- Fatal error: Uncaught Error: Non-static method B::bb() cannot be called statically in /in/pWAfW:20 Stack trace: #0 /in/pWAfW(26): C->bb() #1 {main} thrown in /in/pWAfW on line 20
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
class- Deprecated: Non-static method B::bb() should not be called statically in /in/pWAfW on line 20 trait- Fatal error: Uncaught Error: Cannot access parent:: when current class scope has no parent in /in/pWAfW:12 Stack trace: #0 /in/pWAfW(20): B::bb() #1 /in/pWAfW(26): C->bb() #2 {main} thrown in /in/pWAfW on line 12
Process exited with code 255.
Output for 7.3.32 - 7.3.33
class-trait- Fatal error: Uncaught Error: Cannot access parent:: when current class scope has no parent in /in/pWAfW:12 Stack trace: #0 /in/pWAfW(20): B::bb() #1 /in/pWAfW(26): C->bb() #2 {main} thrown in /in/pWAfW on line 12
Process exited with code 255.
Output for 5.6.8 - 5.6.28
class- Deprecated: Non-static method B::bb() should not be called statically, assuming $this from incompatible context in /in/pWAfW on line 20 trait- Fatal error: Cannot access parent:: when current class scope has no parent in /in/pWAfW on line 12
Process exited with code 255.
Output for 5.5.24 - 5.5.35
class- Strict Standards: Non-static method B::bb() should not be called statically, assuming $this from incompatible context in /in/pWAfW on line 20 trait- Fatal error: Cannot access parent:: when current class scope has no parent in /in/pWAfW on line 12
Process exited with code 255.

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