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<?php error_reporting(-1 ^ E_STRICT); class A { function B() { var_dump($this); } static function C() { $this->B(); var_dump($this); } } A::B(); A::C();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Fatal error: Uncaught Error: Non-static method A::B() cannot be called statically in /in/v3kOt:14 Stack trace: #0 {main} thrown in /in/v3kOt on line 14
Process exited with code 255.
Output for 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Deprecated: Non-static method A::B() should not be called statically in /in/v3kOt on line 14 Fatal error: Uncaught Error: Using $this when not in object context in /in/v3kOt:5 Stack trace: #0 /in/v3kOt(14): A::B() #1 {main} thrown in /in/v3kOt on line 5
Process exited with code 255.
Output for 7.0.0 - 7.0.20
Deprecated: Non-static method A::B() should not be called statically in /in/v3kOt on line 14 Notice: Undefined variable: this in /in/v3kOt on line 5 NULL Fatal error: Uncaught Error: Using $this when not in object context in /in/v3kOt:9 Stack trace: #0 /in/v3kOt(15): A::C() #1 {main} thrown in /in/v3kOt on line 9
Process exited with code 255.
Output for 5.4.1 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Notice: Undefined variable: this in /in/v3kOt on line 5 NULL Fatal error: Using $this when not in object context in /in/v3kOt on line 9
Process exited with code 255.

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