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<?php interface Vendor { public function make() : string; } class Samsung implements Vendor{ public function make() { return "This is Samsung product"; } } $vendor = new Samsung(); echo $vendor->make();
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Declaration of Samsung::make() must be compatible with Vendor::make(): string in /in/CJV0X on line 7
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
Fatal error: Declaration of Samsung::make() must be compatible with Vendor::make(): string in /in/CJV0X on line 6
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/CJV0X on line 3
Process exited with code 255.

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