<?php
abstract class C {
const NAME = '';
static $FOO = self::NAME . ' FOO';
}
class D extends C {
const NAME = 'D';
}
class E extends C {
const NAME = 'E';
}
var_dump(C::FOO);
var_dump(D::FOO);
var_dump(E::FOO);
Fatal error: Uncaught Error: Undefined constant C::FOO in /in/MBN3P:16
Stack trace:
#0 {main}
thrown in /in/MBN3P 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: Undefined constant C::FOO in /in/MBN3P:16
Stack trace:
#0 {main}
thrown in /in/MBN3P on line 16
Process exited with code 255.
Fatal error: Uncaught Error: Undefined class constant 'FOO' in /in/MBN3P:16
Stack trace:
#0 {main}
thrown in /in/MBN3P on line 16
Process exited with code 255.
Output for 5.6.7 - 5.6.28
Fatal error: Undefined class constant 'FOO' in /in/MBN3P on line 16
Process exited with code 255.
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35
Parse error: syntax error, unexpected '.', expecting ',' or ';' in /in/MBN3P on line 5
Process exited with code 255.