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<?php class Student { private static $age = NULL; public function setAge($age) { Student::$age = $age; return $this; } } Student::setAge(20);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Non-static method Student::setAge() cannot be called statically in /in/WjQUP:7 Stack trace: #0 {main} thrown in /in/WjQUP on line 7
Process exited with code 255.
Output for 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Deprecated: Non-static method Student::setAge() should not be called statically in /in/WjQUP on line 7 Fatal error: Uncaught Error: Using $this when not in object context in /in/WjQUP:4 Stack trace: #0 /in/WjQUP(7): Student::setAge(20) #1 {main} thrown in /in/WjQUP on line 4
Process exited with code 255.
Output for 7.3.32 - 7.3.33
Fatal error: Uncaught Error: Using $this when not in object context in /in/WjQUP:4 Stack trace: #0 /in/WjQUP(7): Student::setAge(20) #1 {main} thrown in /in/WjQUP on line 4
Process exited with code 255.
Output for 7.0.0 - 7.0.20
Deprecated: Non-static method Student::setAge() should not be called statically in /in/WjQUP on line 7 Notice: Undefined variable: this in /in/WjQUP on line 4
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Strict Standards: Non-static method Student::setAge() should not be called statically in /in/WjQUP on line 7 Notice: Undefined variable: this in /in/WjQUP on line 4

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