3v4l.org

run code in 300+ PHP versions simultaneously
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Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.18, 8.4.1 - 8.4.5
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Fatal error: Declaration of Person::upgrade(): PersonAccount must be compatible with Upgradeable::upgrade(): Loginable in /in/iDLqU on line 17
Process exited with code 255.
preferences:
112.2 ms | 412 KiB | 5 Q