[arrays] read arrays from a form

I have a example.html ------------------------------- <script> function add() { var res=0; for(x=0;x<3;x++)res=res+parseFloat(example.text[x].value); example.result.value=res; } </script> <html> <form name="example" action="show.php"> <input type="text" name="text" value="1"><br> <input type="text" name="text" value="2"><br> <input type="text" name="text" value="3"><br> <input type="text" name="result" value="0"><br> <input type="button" value="add" OnClick="add()"> <input type="submit" value="show"> </form> </html> ------------------------------- and show.php ------------------------------- <html> <? echo $text[0]."+".$text[1]."+".$text[2]."="; echo $result; ?> </html> PHP return the error: Notice: Uninitialized string offset: 1 in show.php on line 4 How could I know the values of the text? without modify example.html