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<?php class Foo { public function __debugInfo() { return 'debugging'; } } var_dump(new Foo());
Output for 8.5.0 - 8.5.7
Fatal error: __debuginfo() must return an array in /in/5Rkam on line 9 Stack trace: #0 /in/5Rkam(9): var_dump(Object(Foo)) #1 {main}
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22
Fatal error: __debuginfo() must return an array in /in/5Rkam on line 9
Process exited with code 255.

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