php_stream_copy_to_mem()
allocates a buffer
maxlen
+1 bytes in length using
pemalloc()
(passing
persistent
). It then reads
maxlen
bytes from
src
and stores them in the allocated buffer.
The allocated buffer is returned in
buf
, and the number of bytes successfully read. You, the caller,
are responsible for freeing the buffer by passing it and
persistent
to
pefree()
.
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.