protected function isCharsAllowed(&$im)
{
$c = strlen($this->text);
// Special case, if we have 10 digits, the last one can be X
if ($c === 10) {
if (array_search($this->text[9], $this->keys) === false && $this->text[9] !== 'X') {
$this->drawError($im, 'Char \'' . $this->text[9] . '\' not allowed.');
return false;
}
// Drop the last char
$this->text = substr($this->text, 0, 9);
}
return parent::isCharsAllowed($im);
}
