$size = 2097152
The amount of bytes specified as buffer size is the maximum amount of data read at once from resources or files. The default size is 2M (2097152 bytes).
Be aware that if you enable gzip compression and you set a very low buffer size that the actual file size may grow due to added gzip headers for each sent chunk of the specified size.
Returns PEAR_Error (HTTP_DOWNLOAD_E_INVALID_PARAM) if $size is not greater than 0 bytes.
int $size = 2097152 - amount of bytes to buffer
Returns TRUE on success, PEAR_Error on failure.
This function can not be called statically.