(no version information, might be only in CVS)
php_stream_copy_to_stream()
attempts to read up to
maxlen
bytes of data from
src
and write them to
dest
, and returns the number of bytes that were successfully
copied.
If you want to copy all remaining data from the
src
stream, pass the constant
PHP_STREAM_COPY_ALL
as the value of
maxlen
.
注意 This function will attempt to copy the data in the most efficient manner, using memory mapped files when possible.