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<?php const A = 1; const B = A * 2; class C { const THREE = TWO + 1; const ONE_THIRD = A / self::THREE; const SENTENCE = 'The value of THREE is '.self::THREE; public function f($a = A + self::THREE) { return $a; } } echo (new C)->f()."\n"; echo C::SENTENCE; ?>
Output for 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Undefined constant "TWO" in /in/YL9SG:6 Stack trace: #0 /in/YL9SG(15): [constant expression]() #1 {main} thrown in /in/YL9SG on line 6
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: Undefined constant "TWO" in /in/YL9SG:15 Stack trace: #0 {main} thrown in /in/YL9SG on line 15
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant TWO - assumed 'TWO' (this will throw an Error in a future version of PHP) in /in/YL9SG on line 15 Warning: A non-numeric value encountered in /in/YL9SG on line 15 2 The value of THREE is 1
Output for 7.1.0 - 7.1.33
Notice: Use of undefined constant TWO - assumed 'TWO' in /in/YL9SG on line 15 Warning: A non-numeric value encountered in /in/YL9SG on line 15 2 The value of THREE is 1
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33
Notice: Use of undefined constant TWO - assumed 'TWO' in /in/YL9SG on line 15 2 The value of THREE is 1
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38
Parse error: syntax error, unexpected '*', expecting ',' or ';' in /in/YL9SG on line 3
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_CONST in /in/YL9SG on line 2
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_CONST in /in/YL9SG on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/YL9SG on line 2
Process exited with code 255.

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