class myClassName{

    function funtionOne(){

        $a = '123';
        $b = '456';
        $c = '789';

        $d = 'var_value';
        $e = 'var_value';
        $f = 'var_value';
    }

    function funtionTwo(){
        $a = '123';
        $b = '456';
        $c = '789';

        $g = 'var_value';
        $h = 'var_value';
        $i = 'var_value';
    }

}

class myClassName{

    function funtionABC(){
        $a = '123';
        $b = '456';
        $c = '789';
    }

    function funtionOne(){

        include functionABC's content here

        $d = 'var_value';
        $e = 'var_value';
        $f = 'var_value';
    }

    function funtionOne(){

        include functionABC's content here

        $g = 'var_value';
        $h = 'var_value';
        $i = 'var_value';
    }

}