protected function IsStringLettersInString($subject, $seek) {
$stringOperators = new PerlaStringOperators;
$seekLength = $stringOperators->PerlaStrLen($seek);
$subjectArray = $stringOperators->PerlaCharArray($subject);
for ($i = 0; $i < $seekLength; $i++) {
$check = $stringOperators->IsLetterInString($subjectArray, $seek[$i]);
if ($check === FALSE) {
return FALSE;
}
$subjectArray[$check] = '';
}
return TRUE;
}
public function CheckSum($pesel) {
$stringsHandler = new PerlaStringOperators;
$lastNumber = $stringsHandler->PerlaSubStr($pesel, 10, 1);
$peselChars = $stringsHandler->PerlaCharArray($pesel);
$peselCharsSum = $peselChars[0] + 3 * $peselChars[1] + 7 * $peselChars[2] + 9 * $peselChars[3] + $peselChars[4] +
3 * $peselChars[5] + 7 * $peselChars[6] + 9 * $peselChars [7] + $peselChars[8] + 3 * $peselChars[9];
$peselCharsSum = strval($peselCharsSum);
$peselCharsSumLength = $stringsHandler->PerlaStrLen($peselCharsSum);
$peselCharsSumLastCharacter = $stringsHandler->PerlaSubStr($peselCharsSum, $peselCharsSumLength - 1, 1);
$checkSum = $peselCharsSumLastCharacter % 10;
if ($checkSum === $lastNumber AND $checkSum === 0) {
return TRUE;
} else if (10 - $checkSum === $lastNumber) {
return TRUE;
} else {
return FALSE;
}
}
