<form name="form1" action="/index.php/api/user/uploadimage" method="post" enctype="multipart/form-data">

   <!-- <input type="file" name="photo[]" />-->

    <input type="file" name="photo[]"  multiple="multiple"/>

  <input type="submit" />

</form>

 public function uploadimage(){

        $data=$this->requestdata();

        echo "<pre>";

        print_r($_FILES['photo']);

        print_r($_FILES);

        $upload = new \Think\Upload();// 实例化上传类

        $upload->maxSize   =     113145728 ;// 设置附件上传大小

        $upload->exts      =     array('jpg', 'gif', 'png', 'jpeg');// 设置附件上传类型

        $upload->savePath  =      'head_pic/'; // 设置附件上传目录

        $info=array();

        foreach ($_FILES['photo']['name'] as $key=>$value){

            $file1=array();

            $file1["photo"]['name']=$value;

            $file1["photo"]['type']=$_FILES['photo']["type"][$key];

            $file1["photo"]['tmp_name']=$_FILES['photo']["tmp_name"][$key];

            $file1["photo"]['error']=$_FILES['photo']["error"][$key];

            $file1["photo"]['size']=$_FILES['photo']["size"][$key];

            $info   =   $upload->upload();

        }

        print_r($info);

        //print_r($file1);