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<?php function f(&$a) { $a++; } function g($a) { $v = $a; return $v; } $a = function() {}; //$c = &g("a"); f($e = 3); var_dump($e);
Output for 8.3.0 - 8.3.6
Fatal error: Uncaught Error: f(): Argument #1 ($a) could not be passed by reference in /in/1sqLp:10 Stack trace: #0 {main} thrown in /in/1sqLp on line 10
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Fatal error: Uncaught Error: f(): Argument #1 ($a) cannot be passed by reference in /in/1sqLp:10 Stack trace: #0 {main} thrown in /in/1sqLp on line 10
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Only variables should be passed by reference in /in/1sqLp on line 10 int(3)
Output for 7.3.32 - 7.3.33
int(3)
Output for 5.3.28 - 5.3.29, 5.4.20 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Strict Standards: Only variables should be passed by reference in /in/1sqLp on line 10 int(3)
Output for 5.3.0 - 5.3.27, 5.4.0 - 5.4.19
Strict Standards: Only variables should be passed by reference in /in/72Iej on line 10 int(3)
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/72Iej on line 6
Process exited with code 255.
Output for 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/72Iej on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/72Iej on line 6
Process exited with code 255.
Output for 4.3.0
Parse error: parse error, unexpected T_FUNCTION in /in/1sqLp on line 6
Process exited with code 255.

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