/**
* Unpack a long.
*
* @param mixed $value
*
* @return int the long unpacked
*/
public static function unpackLong($value)
{
$first = substr($value, 0, 4);
$last = substr($value, 4, 4);
// First of all, unpack 8 bytes, divided into hi and low parts
$hi = unpack('N', $first);
$hi = reset($hi);
$low = unpack('N', $last);
$low = reset($low);
// Unpack 64-bit signed long
return Math::unpackI64($hi, $low);
}
