5 views 
Syntax Syntax
Parameters Parameters
- $GUIDstring
-
(Required)
Return Return
(string)
Source Source
File: wp-includes/ID3/module.audio-video.asf.php
*
* @return string
*/
public static function GUIDtoBytestring($GUIDstring) {
// Microsoft defines these 16-byte (128-bit) GUIDs in the strangest way:
// first 4 bytes are in little-endian order
// next 2 bytes are appended in little-endian order
// next 2 bytes are appended in little-endian order
// next 2 bytes are appended in big-endian order
// next 6 bytes are appended in big-endian order
// AaBbCcDd-EeFf-GgHh-IiJj-KkLlMmNnOoPp is stored as this 16-byte string:
// $Dd $Cc $Bb $Aa $Ff $Ee $Hh $Gg $Ii $Jj $Kk $Ll $Mm $Nn $Oo $Pp
$hexbytecharstring = chr(hexdec(substr($GUIDstring, 6, 2)));
$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 4, 2)));
$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 2, 2)));
$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 0, 2)));
$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 11, 2)));
$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 9, 2)));
$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 16, 2)));
$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 14, 2)));
$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 19, 2)));
$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 21, 2)));
$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 24, 2)));
$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 26, 2)));
$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 28, 2)));
$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 30, 2)));
$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 32, 2)));
$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 34, 2)));