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run code in 150+ php & hhvm versions
Bugs & Features
<?php /* Challenge 2: Implement AnswerInterface and get Question to echo "4". */ class Question { public function __construct(AnswerInterface $answer) { echo "What is 2 + 2?\n"; $answer = $answer->get()->the()->answer(); if ($answer instanceof AnswerInterface) { echo $answer . PHP_EOL; } } } interface AnswerInterface { public function get(); public function the(); public function answer(); } // start editing here class Answer implements AnswerInterface { } // end editing here $answer = new Answer; $question = new Question($answer);
Output for 7.0.0 - 7.1.0
Fatal error: Class Answer contains 3 abstract methods and must therefore be declared abstract or implement the remaining methods (AnswerInterface::get, AnswerInterface::the, AnswerInterface::answer) in /in/UovkC on line 28
Process exited with code 255.
Output for hhvm-3.12.0
Fatal error: Class Answer contains abstract method (get) and must therefore be declared abstract or implement the remaining methods in /in/UovkC on line 28
Process exited with code 255.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.1.0 - 5.6.28
Fatal error: Class Answer contains 3 abstract methods and must therefore be declared abstract or implement the remaining methods (AnswerInterface::get, AnswerInterface::the, AnswerInterface::answer) in /in/UovkC on line 31
Process exited with code 255.
Output for 5.0.5
Fatal error: Class Answer contains 3 abstract methods and must therefore be declared abstract or implement the remaining methods (AnswerInterface::get, AnswerInterface::the, AnswerInterface::answer, ...) in /in/UovkC on line 31
Process exited with code 255.
Output for 5.0.0 - 5.0.4
Fatal error: Class Answer contains 3 abstract methods and must therefore be declared abstract (AnswerInterface::get, AnswerInterface::the, AnswerInterface::answer, ...) in /in/UovkC on line 31
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/UovkC on line 9
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/UovkC on line 9
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/UovkC on line 9
Process exited with code 255.