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run code in 150+ php & hhvm versions
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<?php class Test1 { public function __construct(&$x){ ++$x; echo "You sent me $x\n"; } } $a = 8; $o = new Test1($b = $a); var_dump($b,$b == $GLOBALS['b']); class Test2 { public function __construct(&$x){ ++$x; echo "You sent me $x\n"; } } $a = 8; $o = new Test2($b = &$a); var_dump($b,$b == $GLOBALS['b']);
Output for 7.0.0 - 7.1.0
Notice: Only variables should be passed by reference in /in/EA0qZ on line 9 You sent me 9 int(8) bool(true) You sent me 9 int(9) bool(true)
Output for hhvm-3.10.0 - 3.12.0
Strict Warning: Only variables should be passed by reference in /in/EA0qZ on line 9 You sent me 9 int(8) bool(true) You sent me 9 int(9) bool(true)
Output for 5.1.0 - 5.6.28
Strict Standards: Only variables should be passed by reference in /in/EA0qZ on line 9 You sent me 9 int(8) bool(true) You sent me 9 int(9) bool(true)
Output for 5.0.0 - 5.0.5
Fatal error: Only variables can be passed by reference in /in/EA0qZ 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/EA0qZ on line 3
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/EA0qZ on line 3
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/EA0qZ on line 3
Process exited with code 255.