PHPda parolni tasdiqlash

Yana bir nuans mavjud: eski va yangi parollar password turidagi inputlarda kiritilishi kerak. Ma'lum bo'ladiki, foydalanuvchi yangi parol o'rniga aniq nima kiritganini ko'rmaydi, bu esa xatolarga olib kelishi mumkin. Yangi parol uchun parolning o'zi va uning tasdiqlanishi kiritilishi uchun qilish kerak:

html<form action="" method="POST">
  <input type="password" name="old_password">
  <input type="password" name="new_password">
  <input type="password" name="new_password_confirm">
  <input type="submit" name="submit">
</form>