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<?php class test { public $memvar; public function __construct(&$a=1) { $a = 100; $this->memvar = ++$a; } public function PlusOne() { return $this->memvar; } } $o = new test($a=25); var_dump($a,$o->PlusOne());// 126?
Output for 8.3.0 - 8.3.6
Fatal error: Uncaught Error: test::__construct(): Argument #1 ($a) could not be passed by reference in /in/U3gMf:15 Stack trace: #0 {main} thrown in /in/U3gMf on line 15
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Fatal error: Uncaught Error: test::__construct(): Argument #1 ($a) cannot be passed by reference in /in/U3gMf:15 Stack trace: #0 {main} thrown in /in/U3gMf on line 15
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Notice: Only variables should be passed by reference in /in/U3gMf on line 15 int(25) int(101)
Output for 7.3.32 - 7.3.33, 7.4.26
int(25) int(101)
Output for 5.1.2 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.37, 5.6.0 - 5.6.28
Strict Standards: Only variables should be passed by reference in /in/U3gMf on line 15 int(25) int(101)
Output for 5.0.0 - 5.0.5, 5.1.1
int(101) int(101)
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/U3gMf on line 16
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/U3gMf on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/U3gMf 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/U3gMf on line 3
Process exited with code 255.

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