<?php
abstract class parentc {
protected static $config=1;
protected static $db;
}
class x extends parentc {
public function __construct() {
static::$config='x';
echo (static::$config);
public function echo() {
echo (static::$config);
}
}
}
class y extends parentc {
public function __construct() {
static::$config='y';
echo (static::$config);
}
public function echo() {
echo (static::$config);
}
}
$x=new x();
$y=new y();