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run code in 500+ PHP versions simultaneously
<?php trait t { const parent = parent::class; const grandparent = self::parent::class; } class x { use t; // valid but just don't even think about using x::parent, } class y extends x { use t; } class z extends y { } echo y::parent; // x echo z::parent; // y
Output for 8.5.0 - 8.5.3
Fatal error: (expression)::class cannot be used in constant expressions in /in/4s7KM on line 5 Stack trace: #0 {main}
Process exited with code 255.
Output for 8.3.0 - 8.3.30, 8.4.1 - 8.4.18
Fatal error: (expression)::class cannot be used in constant expressions in /in/4s7KM on line 5
Process exited with code 255.
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