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<?php trait impl { public function dothis() { echo 'trait'; } } class Abs implements Iface { abstract function dothis(); } class Foo extends Abs { use impl; } interface Iface { public function dothis(); } (new Foo)->dothis();
Output for 5.4.0 - 5.4.28
Fatal error: Class Abs contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (Abs::dothis) in /in/AcUpB on line 14
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_STRING in /in/AcUpB on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/AcUpB on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/AcUpB on line 3
Process exited with code 255.

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