3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { public function __construct( public int $a = 1 ) {} } class B extends A { public function __construct( public string $b = 'hello' ) {} } $b = new B(); var_dump($b->a, $b->b);
Output for 8.1.1 - 8.1.28, 8.2.10 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Fatal error: Uncaught Error: Typed property A::$a must not be accessed before initialization in /in/kd90M:16 Stack trace: #0 {main} thrown in /in/kd90M on line 16
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Fatal error: Uncaught Error: Typed property A::$a must not be accessed before initialization in /in/kd90M:16 Stack trace: #0 {main} thrown in /in/kd90M on line 16
Process exited with code 255.
Output for 7.2.0 - 7.2.32, 7.3.0 - 7.3.20, 7.4.0 - 7.4.8
Parse error: syntax error, unexpected 'public' (T_PUBLIC), expecting variable (T_VARIABLE) in /in/kd90M on line 5
Process exited with code 255.

preferences:
99.47 ms | 402 KiB | 91 Q