need to generate a unique id on submit ,in php form

[satyasampan]

<?php
$con = mysql_connect("localhost","root","");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}

mysql_select_db("tutorial", $con);
if($_REQUEST["submit"]=="submit")
{
$sql="INSERT INTO details ( Name, Surname, father, Gender, Martialstatus, Qualification, specification, Aggregate, Address, City, State,Pincode, PassportId, Mobile, EmailId)
VALUES
('$_POST[Name]','$_POST[Surname]','$_POST[father]','$_POST[Gender]','$_POST[Martialstatus]','$_POST[Qualification]','$_POST[specification]','$_POST[Aggregate]','$_POST[Address]''$_POST[City]','$_POST[State]','$_POST[Pincode]','$_POST[PassportId]','$_POST[Mobile]','$_POST[EmailId]')";

if (!mysql_query($sql,$con))
{
die('Error: ' . mysql_error());
}
}

mysql_close($con);
?>


in this table Id is primary key and set to auto increment.


a php form was created to insert the data.. and on submit from that form a unique code must be generated and it should go into Id column in the table...
i think a function is needed ,can anyone help me in writing that function...please

[Claus Mygind]

If you have set your key field (id) to autoinc, then you don't have to do anything to generate the next value. The insert function will automatically add the next value to that field/column in your table.

[AyakaNamase09]

if you want a value of like this 0001 and auto increment you can use the str_pad