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run code in 150+ php & hhvm versions
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<?php class Profile { private $active = false; public function activate() { $this->active = true; } public function isActive() { return $this->active; } } interface Event { function execute($object); } class ProfileWasActivated implements Event{ public function execute(Profile $profile) { $profile->activate(); } }
Output for 7.0.0 - 7.1.0
Fatal error: Declaration of ProfileWasActivated::execute(Profile $profile) must be compatible with Event::execute($object) in /in/Fl4i4 on line 19
Process exited with code 255.
Output for 5.0.0 - 5.3.29, hhvm-3.12.0
Fatal error: Declaration of ProfileWasActivated::execute() must be compatible with that of Event::execute() in /in/Fl4i4 on line 19
Process exited with code 255.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.4.0 - 5.6.28
Fatal error: Declaration of ProfileWasActivated::execute() must be compatible with Event::execute($object) in /in/Fl4i4 on line 19
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/Fl4i4 on line 4
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/Fl4i4 on line 4
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/Fl4i4 on line 4
Process exited with code 255.