getid3_asf::GUIDtoBytestring() public WP 1.0

{} It's a method of the class: getid3_asf{}

No Hooks.

Return

String.

Usage

$result = getid3_asf::GUIDtoBytestring( $GUIDstring );

$GUIDstring(string) (required)

-

Code of getid3_asf::GUIDtoBytestring() getid3 asf::GUIDtoBytestring ^{WP 5.7.2}

<?php
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)));

	return $hexbytecharstring;
}