Description:
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There is, as far as I can discern, no mechanism for detecting exceeded max_post_size when dealing with file uploads.

Setting max_post_size >= upload_max_filesize is a good safety for single files, but when uploading multiple files is of no use, as individual files can be within upload_max_filesize but can cumulatively exceed max_post_size.

The php://input wrapper and $HTTP_RAW_POST_DATA aren't populated when data is posted with enctype multipart/form-data, otherwise that'd be a simple way of checking the POST data size.

My request is for a method of detecting when max_post_size is exceeded, so it can be handled gracefully within a script.  Having php://input filled when data is of multipart/form-data would do nicely.