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<?php trait SmartObject { public function __call(string $name, array $args) { return 'smart ' . $name; } } class Component { use SmartObject; } class FormControl extends Component { public function __call(string $name, array $args): mixed { return 'control ' . $name; } } class CustomFormControl extends FormControl { use SmartObject; } var_dump((new FormControl)->foo()); var_dump((new CustomFormControl)->foo());
Output for 8.5.0
Fatal error: Declaration of CustomFormControl::__call(string $name, array $args) must be compatible with FormControl::__call(string $name, array $args): mixed in /in/35EZW on line 4 Stack trace: #0 {main}
Process exited with code 255.
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14
Fatal error: Declaration of SmartObject::__call(string $name, array $args) must be compatible with FormControl::__call(string $name, array $args): mixed in /in/35EZW on line 4
Process exited with code 255.

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