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<?php class Test { public function foo() { return ++$this; } } $t = new Test(); var_dump($t->foo());
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
Fatal error: Uncaught TypeError: Cannot increment Test in /in/0cjp6:5 Stack trace: #0 /in/0cjp6(10): Test->foo() #1 {main} thrown in /in/0cjp6 on line 5
Process exited with code 255.
Output for 7.0.0 - 7.0.24, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
object(Test)#1 (0) { }

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