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<?php interface SomeInterface { public function getString() : string; } class SomeClass implements SomeInterface { public function getString() { return 'some string'; } } var_dump((new SomeClass())->getString());
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Fatal error: Declaration of SomeClass::getString() must be compatible with SomeInterface::getString(): string in /in/miJ1P on line 13
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Fatal error: Declaration of SomeClass::getString() must be compatible with SomeInterface::getString(): string in /in/miJ1P on line 10
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/miJ1P on line 6
Process exited with code 255.
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