3v4l.org

run code in 500+ PHP versions simultaneously
<?php class A {} class B { public function __construct( public A $a = new A() ) { } } var_dump(new B);
Output for 7.4.0 - 7.4.30
Parse error: syntax error, unexpected 'public' (T_PUBLIC), expecting variable (T_VARIABLE) in /in/W4DSG on line 5
Process exited with code 255.
Output for 8.0.1 - 8.0.21
Fatal error: Constant expression contains invalid operations in /in/W4DSG on line 4
Process exited with code 255.
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
object(B)#1 (1) { ["a"]=> object(A)#2 (0) { } }

preferences:
35.15 ms | 1143 KiB | 11 Q