3v4l.org

run code in 300+ PHP versions simultaneously
<?php class MyClass { function make(): MyClass { return new MyClass(); } } class MyOtherClass extends MyClass { function make(): MyOtherClass { return new MyOtherClass(); } }
Output for 7.4.3 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Output for 7.2.29 - 7.2.33, 7.3.16 - 7.3.33
Fatal error: Declaration of MyOtherClass::make(): MyOtherClass must be compatible with MyClass::make(): MyClass in /in/ip7fA on line 16
Process exited with code 255.
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.30, 5.6.7 - 5.6.14
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/ip7fA on line 5
Process exited with code 255.
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116.2 ms | 402 KiB | 199 Q