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<?php define('test', function($input) { $output = $input; // do something here return $output; }); $n = test(123);
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Call to undefined function test() in /in/LkNAi:10 Stack trace: #0 {main} thrown in /in/LkNAi on line 10
Process exited with code 255.
Output for 8.0.0 - 8.0.30
Fatal error: Uncaught TypeError: define(): Argument #2 ($value) cannot be an object, Closure given in /in/LkNAi:8 Stack trace: #0 /in/LkNAi(8): define('test', Object(Closure)) #1 {main} thrown in /in/LkNAi on line 8
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Constants may only evaluate to scalar values, arrays or resources in /in/LkNAi on line 8 Fatal error: Uncaught Error: Call to undefined function test() in /in/LkNAi:10 Stack trace: #0 {main} thrown in /in/LkNAi on line 10
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
Warning: Constants may only evaluate to scalar values or arrays in /in/LkNAi on line 8 Fatal error: Uncaught Error: Call to undefined function test() in /in/LkNAi:10 Stack trace: #0 {main} thrown in /in/LkNAi on line 10
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Warning: Constants may only evaluate to scalar values in /in/LkNAi on line 8 Fatal error: Call to undefined function test() in /in/LkNAi on line 10
Process exited with code 255.
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/LkNAi 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, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/LkNAi on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/LkNAi on line 3
Process exited with code 255.

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