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<?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) { var_dump('yo'); echo $answer . PHP_EOL; } } } interface AnswerInterface { public function get(); public function the(); public function answer(); } // start editing here class Answer implements AnswerInterface { public function get() { return $this; } public function the() { return $this; } public function answer() { return $this; } public function __toString() { return 4; } } // end editing here $answer = new Answer; $question = new Question($answer);
Output for 7.1.0
Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; Answer has a deprecated constructor in /in/ZmEAN on line 30 What is 2 + 2? string(2) "yo" Recoverable fatal error: Method Answer::__toString() must return a string value in /in/ZmEAN on line 16
Process exited with code 255.
Output for 7.0.0 - 7.0.14
Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; Answer has a deprecated constructor in /in/ZmEAN on line 30 What is 2 + 2? string(2) "yo" Catchable fatal error: Method Answer::__toString() must return a string value in /in/ZmEAN on line 16
Process exited with code 255.
Output for 5.2.0 - 5.6.28
What is 2 + 2? string(2) "yo" Catchable fatal error: Method Answer::__toString() must return a string value in /in/ZmEAN on line 16
Process exited with code 255.
Output for 5.0.2 - 5.1.6
What is 2 + 2? string(2) "yo" Object id #1
Output for 5.0.0 - 5.0.1
What is 2 + 2? string(2) "yo" Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/ZmEAN on line 16 Object id #1PHP_EOL
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/ZmEAN 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/ZmEAN 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/ZmEAN on line 9
Process exited with code 255.