[PHP] Re: How to write binary data to a file?
- Date: Wed, 27 Jul 2016 00:59:30 +0200
- From: Christoph Becker <cmbecker69@xxxxxx>
- Subject: [PHP] Re: How to write binary data to a file?
On 27.07.2016 at 00:10, David Spector wrote:
> All I can find in the PHP Manual for writing raw bytes (unsigned
> integers) to a file is fwrite. But when I use it, it seems to write
> characters, not raw bytes. For example, the value 1 (0b1) is actually
> written as 0x31, not 0x01 as desired. […]
fwrite() accepts a string argument, and so other types are juggled to
string before they are written.
> It doesn't work this way in C or C++, and the PHP Manual says nothing
> about this.
Indeed. A link to pack() appears to be useful. To write a byte
stream, you could use something like:
fwrite($stream, pack('C*', 1, 2, 3));
Christoph M. Becker
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php