<?php
class A
{
const a = 0;
}
class B extends A
{
const a = 4;
}
class C extends A
{
}
echo "B::a: " . B::a . "\n";
echo "C::a: " . C::a . "\n";
PD9waHAKCmNsYXNzIEEKewogICAgY29uc3QgYSA9IDA7Cn0KCmNsYXNzIEIgZXh0ZW5kcyBBCnsKICAgIGNvbnN0IGEgPSA0Owp9CgpjbGFzcyBDIGV4dGVuZHMgQQp7Cn0KCmVjaG8gIkI6OmE6ICIgLiBCOjphIC4gIlxuIjsKZWNobyAiQzo6YTogIiAuIEM6OmEgLiAiXG4iOw==