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run code in 300+ PHP versions simultaneously
<?php class A { const B = ['a', 'b']; } echo isset(A::B[0]) ? 1 : 0;
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
1
Output for 5.6.8 - 5.6.28
Fatal error: Cannot use isset() on the result of an expression (you can use "null !== expression" instead) in /in/JXUWd on line 8
Process exited with code 255.
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35
Fatal error: Arrays are not allowed in class constants in /in/JXUWd on line 5
Process exited with code 255.

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