(PHP 5 >= 5.4.0, PHP 7, PHP 8)
stream_set_chunk_size — Set the stream chunk size
$stream, int $size): intSet the stream chunk size.
streamThe target stream.
sizeThe desired new chunk size.
Returns the previous chunk size on success.
Will return false if size is less than 1 or
greater than PHP_INT_MAX.
Will emit an E_WARNING level error if size
is less than 1 or greater than PHP_INT_MAX.