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run code in 150+ php & hhvm versions
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<?php class Test { private $privateProperty = "hello"; public function myMethod() { $that = &$this; $map = array_map( function($value) use($that) { return $that->privateProperty." ".$value; }, array( "city", "world", "universe" ) ); return $map; } } $test = new Test(); print_r($test->myMethod());
Output for 5.4.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Array ( [0] => hello city [1] => hello world [2] => hello universe )
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.3.0 - 5.3.29
Fatal error: Cannot access private property Test::$privateProperty in /in/TA6dO on line 10
Process exited with code 255.
Output for 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in /in/TA6dO on line 9
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION, expecting ')' in /in/TA6dO on line 9
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/TA6dO 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/TA6dO 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/TA6dO on line 4
Process exited with code 255.