3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface I {} function foo() { return new class { public static function foo() { return new class implements I {}; } }; } var_dump(foo()::foo()::class);
Output for 8.1.23 - 8.1.28, 8.2.10 - 8.2.18, 8.3.0 - 8.3.6
string(25) "I@anonymous/in/W50N9:7$1"
Output for 7.0.0
Fatal error: Dynamic class names are not allowed in compile-time ::class fetch in /in/W50N9 on line 12
Process exited with code 255.
Output for 5.5.24 - 5.5.30, 5.6.8 - 5.6.16
Parse error: syntax error, unexpected 'class' (T_CLASS) in /in/W50N9 on line 5
Process exited with code 255.
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