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run code in 150+ php & hhvm versions
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<?php $x = 1; $a = 2; function foo(&$x) { return function () use (&$x) { return $x; }; } $y = foo($a); $z = foo($x); var_dump($y(), $z()); $x = 100; var_dump($y(), $z());
Output for 5.3.0 - 7.1.0
int(2) int(1) int(2) int(100)
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/p4sTj on line 8
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/p4sTj on line 8
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/p4sTj on line 8
Process exited with code 255.