function IsStringInString($subject, $seek)
 {
     $temp = 0;
     $legthStringFirst = StringLength($subject);
     $legthStringSecond = StringLength($seek);
     for ($i = 0; $i <= $legthStringFirst - $legthStringSecond; $i++) {
         if ($subject[$i] == $seek[$temp]) {
             $new = Dziusio_substr_rev($subject, $legthStringFirst - 1 - $i);
             $new1 = Dziusio_substr($new, $legthStringSecond);
             if ($new1 == $seek) {
                 return true;
             }
         }
     }
     return false;
     //
 }
 function ReturnDate($pesel)
 {
     $data = Dziusio_substr($pesel, 6);
     return $data;
 }