DER supports lengths up to (2**8)**127, however, we'll only support lengths up to (2**8)**4. See
{@link http://itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf#p=13 X.690 paragraph 8.1.3} for more information.
static public decodeLength ( string &$string ) : integer | ||
$string | string | |
return | integer |