{
$ord = ord($ch);
return $ord >= self::CHAR_ASCII_ALPHANUM_LOW && $ord <= self::CHAR_ASCII_ALPHANUM_HIGH;
}
private static function isLetter($ch)
{
$ord = ord($ch);
return $ord >= ord('a') && $ord <= ord('z') || $ord >= ord('A') && $ord <= ord('Z');
}
private static function isDigit($ch)
{
$ord = ord($ch);
return $ord >= ord('0') && $ord <= ord('9');
}
}
EscapeUtil::init();
function uniord($c)
{
$h = ord($c[0]);
if ($h <= 0x7f) {
return $h;
} else {
if ($h < 0xc2) {
return false;
} else {
if ($h <= 0xdf) {
return ($h & 0x1f) << 6 | ord($c[1]) & 0x3f;
} else {
if ($h <= 0xef) {
return ($h & 0xf) << 12 | (ord($c[1]) & 0x3f) << 6 | ord($c[2]) & 0x3f;
} else {
