<?php
abstract class ParentClass {
const TEST_CONSTANT = null;
public function __construct()
{
if (!defined('self::TEST_CONSTANT')) {
throw new Exception("Please define TEST_CONSTANT!");
}
}
abstract protected function someFunction();
}
class ChildClass extends ParentClass {
const TEST_CONSTANT = "value";
protected function someFunction()
{
//some functionality here
}
}
$x = new ChildClass();
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