Instance Method Call x; } public function setX($val) { $this->x = $val; return $this; } } $X = (new foo)->setX(20)->getX(); echo $X; // 20 ]]> Combine with Function Array Dereferencing x; } public function setX($arr) { $this->x = $arr; return $this; } } $X = (new foo2)->setX([0,10,20,30])->getX()[2]; echo $X; // 20 ]]> Instance Method Array Dereferencing