Você procurou por: uploading (Coreano - Inglês)

curlopt_infilesize: when you are uploading a file to a remote site, this option should be used to tell php what the expected size of the infile will be.
curlopt_verbose:

if memory limit is enabled by your configure script, memory_limit also affects file uploading. generally speaking, memory_limit should be larger than post_max_size.
set the order of get / post / cookie variable parsing.