/**
*
*/
abstract class Animal
{
protected abstract function getValue();
protected abstract function prefixValue($prefix);
/**
*
*/
public function printOut()
{
echo $this->getValue() . "\n";
}
}
class ConcreteClass extends AbstractClass
{
protected function getValue()
{
return "ConcreteClass";
}
public function prefixValue($prefix)
{
return "{$prefix} ConcreteClass";
}
}
$class1 = new ConcreteClass();
$class1->printOut();
echo $class1->prefixValue('FOO_') . "\n";
