Using a form in PHP, I am trying to return an SQL value dependant on an entered SQL value?

Question

My DB looks like this

paynumber fullname linemanager
12345 John Smith Jack Jones
12346 Joe Bloggs Andy Smith

I want it so if you enter 12345 into a textfield it will return John Smith in the same text field

I've tried so many mysql_queries I don't know which one to post!

I'm not looking for full code, as I'm not bad at that, but please point me in the right direction!

Cheers!

    <?php


    $mysql_host = "host"; 
    $mysql_username = "user"; 
    $mysql_password = "pass"; 
    $link = mysql_connect("$mysql_host", "$mysql_username", "$mysql_password");
    mysql_select_db("dbname",$link); 

    $pay_number=intval($_POST["pay_number"]);
    $result = mysql_query($link,"SELECT fullname from officers where paynumber=$pay_number");

    echo $result;

    ?>

Answer 1

SELECT fullname from myTable where paynumber=12345

What's so tough about it? Then you can display it anywhere you like. Can add a little bit of AJAX to grab the result and show in the same field.

EDIT:

Lets say your field on your HTML form was named pay_number and form method was POST

Then in your PHP processing code you could do

$pay_number=intval($_POST["pay_number"]);
$query="SELECT fullname from myTable where paynumber=$pay_number";