3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { const X = 1 + self::Z; const Y = 1 - self::Z; const Z = self::Z; function f() { echo static::X; echo static::Y; echo static::Z; } } class B extends A { const Z = 1; } (new B)->f();
Output for 8.3.0 - 8.3.4, 8.3.6
Fatal error: Uncaught Error: Cannot declare self-referencing constant self::Z in /in/5aYB5:6 Stack trace: #0 /in/5aYB5(19): [constant expression]() #1 {main} thrown in /in/5aYB5 on line 6
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: Cannot declare self-referencing constant self::Z in /in/5aYB5:6 Stack trace: #0 /in/5aYB5(19): [constant expression]() #1 {main} thrown in /in/5aYB5 on line 6
Process exited with code 255.
Output for 8.2.0 - 8.2.18
Fatal error: Uncaught Error: Cannot declare self-referencing constant self::Z in /in/5aYB5:6 Stack trace: #0 {main} thrown in /in/5aYB5 on line 6
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
Fatal error: Uncaught Error: Cannot declare self-referencing constant self::Z in /in/5aYB5:19 Stack trace: #0 {main} thrown in /in/5aYB5 on line 19
Process exited with code 255.
Output for 7.0.0 - 7.0.25, 7.1.0 - 7.1.33, 7.2.6 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught Error: Cannot declare self-referencing constant 'self::Z' in /in/5aYB5:19 Stack trace: #0 {main} thrown in /in/5aYB5 on line 19
Process exited with code 255.

preferences:
174.53 ms | 403 KiB | 210 Q