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<?php class A{ private function __invoke(){ return 'Object called as a function'; } } $w = new A(); echo $w->__invoke(); var_export($w);
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
Warning: The magic method A::__invoke() must have public visibility in /in/a18j9 on line 4 Fatal error: Uncaught Error: Call to private method A::__invoke() from global scope in /in/a18j9:12 Stack trace: #0 {main} thrown in /in/a18j9 on line 12
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Warning: The magic method __invoke() must have public visibility and cannot be static in /in/a18j9 on line 4 Fatal error: Uncaught Error: Call to private method A::__invoke() from context '' in /in/a18j9:12 Stack trace: #0 {main} thrown in /in/a18j9 on line 12
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Warning: The magic method __invoke() must have public visibility and cannot be static in /in/a18j9 on line 4 Fatal error: Call to private method A::__invoke() from context '' in /in/a18j9 on line 12
Process exited with code 255.

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