判断文件是否上传文件应该用 A: A、is_uploaded_file($_FILES['upimage']['name']) B: B、is_uploaded_file($_FILES['upimage']['type']) C: C、is_uploaded_file($_FILES['upimage']['tmp_name']) D: D、is_uploaded_file($_FILES['upimage']['size'])

if(____?___($_FILES['upimage']['tmp_name'])){ //判断是否为上传文件$name =$_FILES['upimage']["name"]; //接收上传文件的文件名$type = $_FILES['upimage']["type"]; //接收上传文件的MIME类型$size = $_FILES['upimage']["size"]; //接收上传文件的大小$tmp_name =$_FILES['upimage']["tmp_name"]; //接收上传文件的临时存放目录、文件名$error =$_FILES['upimage']["error"]; //接收上传文件的错误返回值}