通过sonata media Configuration上传图像时，如何在symfony2 sonata media中设置最大上传大小
您可以在每个管理类中使用内联验证，也可以在php.ini中设置此约束:
; Maximum allowed size for uploaded files.
upload_max_filesize = 5M
; Must be greater than or equal to upload_max_filesize
post_max_size = 10M