Thank you very much for your answers and your time.
I did exactly as you told me but I have the same probleme.
I bind the code but in case the user did not insert corect the captcha code the data that he have inserted already do not remain in form.
They remain in form only if the user insert the corect code.
This is the code that I use :
<input name="nume2" type="text" required class="fnormal" placeholder="Numele dumneavoastra" value="<?php echo((isset($_POST["nume2"]))?$_POST["nume2"]:"") ?>" aria-required="true" /><br />
I program in html 5, but I do not think this is the cause of the problem.
in case that someoane alse ask you the same question you can give them this link
I hope you can find a solution for this problem ?