3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface ValidationInterface { public function run(?array $data = null, ?string $group = null, ?string $dbGroup = null): bool; } class Validation implements ValidationInterface { public function run(?array $data = null, ?string $group = null, $dbGroup = null): bool { return true; } } class MyValidation extends Validation { public function run(?array $data = null, ?string $group = null, ?string $dbGroup = null): bool { return true; } }
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
Fatal error: Declaration of MyValidation::run(?array $data = null, ?string $group = null, ?string $dbGroup = null): bool must be compatible with Validation::run(?array $data = null, ?string $group = null, $dbGroup = null): bool in /in/VMDWp on line 15
Process exited with code 255.
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108.78 ms | 407 KiB | 5 Q