重点是返回$this指针，方便调用后面的函数。Operation.phpnumber=$number;}publicfunctionadd($number){$this->number+=return$this;}publicfunctiondecrease($number){$this->number-=$number;返回$这个；}publicfunctionmultiply($number){$this->number*=$number;$这个；}publicfunctiondivision($number){$this->number/=$number;返回$这个；}publicfunctionget(){return$this->number;}}index.phprequire__DIR__。'/IMooc/Operation.php';$operation=newIMooc\Operation(10);$result=$operation->add(2)->decrease(2)->multiply(3)->division(4)->get();var_dump($result);执行结果masaki@masaki-Inspiron:/var/www/imooc$phpindex.phpfloat(7.5)
