; Maximum allowed size for uploaded files.
; http://php.net/upload-max-filesize
upload_max_filesize = 2M--------------在这次文件上传的请求中，所允许的单个文件的最大大小，即每个文件的文件大小都不能超过2M
; Maximum number of files that can be uploaded via a single request
max_file_uploads = 20----------一次post请求所允许的最大上传的文件数量----即一次最多只能传20个文件，多余的文件会自动被忽略