Answer Posted / satyajit das

abstract class is one where the class parameters are not
defined properly and it is controlled by interface like:

interface gggg{
function ss();
}

interface lll{
function mmm();
}

class boat implements gggg,lll{
public function ss();
public function mmm();
}
$dd = new boat();

It is used due to non presence of multiple inheritance in
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