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<?php trait Hello { public function sayHelloWorld() { echo 'Hello'.$this->getWorld(); } abstract public function getWorld( $lies ); } class MyHelloWorld { private $world; use Hello; public function getWorld() { return $this->world; } public function setWorld($val) { $this->world = $val; } } $World = new MyHelloWorld; $World->sayHelloWorld(); $World->setWorld('Daniel'); $World->sayHelloWorld(); $World2 = new MyHelloWorld; $World2->sayHelloWorld();
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Declaration of MyHelloWorld::getWorld() must be compatible with Hello::getWorld($lies) in /in/qpEkC on line 12
Process exited with code 255.

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