3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace Waffles; abstract class A { const FOO = self::FOO; const OTHER = 0; private $waf = self::OTHER; } class B extends A { const FOO = 'waffles'; } $foo = new B(); echo $foo::FOO;
Output for 5.6.0 - 5.6.40, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
waffles
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 waffles
Output for 8.0.0 - 8.0.30
Fatal error: Uncaught Error: Cannot declare self-referencing constant self::FOO in /in/3aIHb:19 Stack trace: #0 {main} thrown in /in/3aIHb on line 19
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught Error: Cannot declare self-referencing constant 'self::FOO' in /in/3aIHb:19 Stack trace: #0 {main} thrown in /in/3aIHb on line 19
Process exited with code 255.
preferences:
241.31 ms | 402 KiB | 300 Q