<?php
class A {
public static $foo = 'hello';
}
class B extends A {
public static $foo = '!';
}
$a1 = new A;
$a2 = new A;
$b = new B;
var_dump($a1::$foo);
var_dump($a2::$foo);
var_dump($b::$foo);
$a1::$foo = '123';
var_dump($a1::$foo);
var_dump($a2::$foo);
var_dump($b::$foo);
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
string(5) "hello"
string(5) "hello"
string(1) "!"
string(3) "123"
string(3) "123"
string(1) "!"