Multiple Checkbox Process Page

CODE (THERE IS NO DISPLAY FOR THIS PAGE)

<?php
$posted_variable= $_POST[posted_field];//post the information from the form page used to query the database for a specific set of information (usually an id)

//set variables to connect to the database
$hostName = "(FILL IN HOSTNAME FOR DB)";
$userName = "(FILL IN USERNAME FOR DB)";
$password = "(FILL IN PASSWORD FOR DB)";
$dbName = "(FILL IN DB NAME)";
// make connection to database 
mysql_connect($hostName, $userName, $password) or die( "Unable to connect to host $hostName");
mysql_select_db($dbName) or die("Unable to select database $dbName");
//query the table for the posted variable to form a list of rows that may be changed based on the checkbox selections
$query_1 = "SELECT * FROM (FILL IN TABLE NAME) WHERE (INSERT FIELD NAME)= '$posted_variable'";
$result_1 = mysql_query($query_1);
$number_1 = mysql_numrows($result_1);
//set up a while loop to look at each row individually and update the necessary field if the checkbox is selected for the viewed row
$i=0;
while($i<$number_1)
{
//get the result of the query for the field to be updated
	$field = mysql_result($result_1,$i, 'field');
//if field is null, (won't overwrite any fields with a value)
	if($field=='')
	{
//get the field necessary for identifying the row
		$field2 = mysql_result($result_1,$i, 'field2');
//because the checkbox names are based on values from database fields, those same values must be used to get the checkbox posts
		$query_2 = "SELECT * FROM (FILL IN TABLE NAME) WHERE (INSERT FIELD NAME)= '$field2'";
		$result_2 = mysql_query($query_2);
		$cb_name_value = mysql_result($result_2,0, 'cb_name_field');
//inside the while (to catch of the values used for the check boxes on the form page) post the variable from the checkbox
		$entered_value= $_POST['cb_'.$cb_name_value];
//if the checkbox is checked, update the field in the database
		if($sent_uva=='1')
		{
//update the field in the database for the current row in the while loop
			$query_update = "UPDATE (FILL IN TABLE NAME) SET field= '$entered_value' WHERE field2= '$field2'";
			$result_update = mysql_query($query_update);
		}
	}
	$i++;
}
//once the page is complete move on to a new page
header('Location:(INSERT NAME OF NEXT PAGE)');
?>