Newbie Needs help adding users to program feature

[topvader]

ok so i think the easiest thing for me to do is to explain my scenario in full first

i have created an admin panel, that governs certain program features, everytime i create a certain feature i then want to add users to that feature

So, my workflow goes as such:

1. Create-feature.php

1a) creates a row in the feature table

1b) creates an Enum("0","1") column in the user field with that feature name

2.)edit-feature.php (the problem step)

2a) print all the usernames in a table with a checkbox

2b) when updated all the users checked will change the ENUM Column from 0 to 1

 

The code for the edit-feature is:

<form name="form1" action="" method=""

//blah blah blah $feature = $_GET['featurename'];//
$ch = "unchecked";

$sql3 = mysql_query("
SELECT *
FROM user
") or die(mysql_error());
while($row = mysql_fetch_array($sql3)){
$un = $row['username'];	
$state = $row[$feature];
if ($state ==1){
$ch = "checked";
}

$usertable ='   <table width="100" border="1" cellspacing="0" cellpadding="0">
      <tr>
        <td><input type="hidden" name="username" id="username" value="'.$un.'"/>' .$un. ' </td>
      </tr>
      <tr>
        <td> <input type="checkbox" name="adduser[]" id="adduser" value="yes" '.$ch.' />
        <label for="adduser"></td>
      </tr>
      </table> ' ;
   echo $usertable;  
}
  ?>
  <input type="hidden" name="featurename" id="featurename" value="'.$feature.'"/>
</form>  

I have the following questions:

once i get this to post i know i need a foreach loop. but how will i tie it to my user table?

 

is there a much easier way of doing this?

please let me know

 

thanks