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<?php class Kitchen { private $yummy = 'cake'; } $reader = function & ($object, $property) { $value = & Closure::bind(function & () use ($property) { return $this->$property; }, $object, $object)->__invoke(); return $value; }; $kitchen = new Kitchen(); $cake = & $reader($kitchen, 'yummy'); $cake = 'sorry, I ate it!'; var_dump($kitchen);
Output for 5.4.0 - 5.6.3, php7@20140507 - 20141101, hhvm-3.4.0 - 3.4.1
object(Kitchen)#2 (1) { ["yummy":"Kitchen":private]=> &string(16) "sorry, I ate it!" }
Output for hhvm-3.3.0 - 3.3.1
Fatal error: Call to undefined method Closure::bind() in /in/QJfqf on line 11
Process exited with code 255.
Output for hhvm-3.0.1, hhvm-3.2.0

Process exited with code 153.
Output for hhvm-3.1.0
Fatal error: Call to undefined method Closure::bind from anonymous context in /in/QJfqf on line 11
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Fatal error: Call to undefined method Closure::bind() in /in/QJfqf on line 9
Process exited with code 255.
Output for 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/QJfqf on line 8
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/QJfqf on line 8
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/QJfqf on line 5
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/QJfqf on line 5
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/QJfqf on line 5
Process exited with code 255.