3v4l.org

run code in 500+ PHP versions simultaneously
<?php class A { protected const int|string|X C = 1; } class B extends A { protected const int|string|Y C = 'a'; }
Output for 8.2.31 - 8.2.34
Parse error: syntax error, unexpected token "|", expecting "=" in /in/KWbU7 on line 4
Process exited with code 255.
Output for 8.3.0 - 8.3.35, 8.4.1 - 8.4.26
Fatal error: Type of B::C must be compatible with A::C of type X|string|int in /in/KWbU7 on line 7
Process exited with code 255.
Output for 8.5.0 - 8.5.11
Fatal error: Type of B::C must be compatible with A::C of type X|string|int in /in/KWbU7 on line 7 Stack trace: #0 {main}
Process exited with code 255.
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31.01 ms | 1158 KiB | 11 Q