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run code in 300+ PHP versions simultaneously
<?php class X { const A = 1, B = 2, C = A + B ; } echo X::C;
Output for 8.3.0 - 8.3.4
Fatal error: Uncaught Error: Undefined constant "A" in /in/bTKXJ:7 Stack trace: #0 /in/bTKXJ(11): [constant expression]() #1 {main} thrown in /in/bTKXJ on line 7
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17
Fatal error: Uncaught Error: Undefined constant "A" in /in/bTKXJ:11 Stack trace: #0 {main} thrown in /in/bTKXJ on line 11
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant A - assumed 'A' (this will throw an Error in a future version of PHP) in /in/bTKXJ on line 11 Warning: Use of undefined constant B - assumed 'B' (this will throw an Error in a future version of PHP) in /in/bTKXJ on line 11 Warning: A non-numeric value encountered in /in/bTKXJ on line 11 Warning: A non-numeric value encountered in /in/bTKXJ on line 11 0
Output for 7.1.0 - 7.1.20
Notice: Use of undefined constant A - assumed 'A' in /in/bTKXJ on line 11 Notice: Use of undefined constant B - assumed 'B' in /in/bTKXJ on line 11 Warning: A non-numeric value encountered in /in/bTKXJ on line 11 Warning: A non-numeric value encountered in /in/bTKXJ on line 11 0
Output for 5.6.8 - 5.6.28, 7.0.0 - 7.0.20
Notice: Use of undefined constant A - assumed 'A' in /in/bTKXJ on line 11 Notice: Use of undefined constant B - assumed 'B' in /in/bTKXJ on line 11 0
Output for 5.5.24 - 5.5.35
Parse error: syntax error, unexpected '+', expecting ',' or ';' in /in/bTKXJ on line 7
Process exited with code 255.

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