Update in php using sql and phpmyadmin - php

Question

I am trying to create an update form to update to the database table. I have created a function that uses sql to create the update, and a function that updates the table. I have also created the code that calls these functions. The error is that nothing is posting or changing when I press submit. It isn't running or editing or updating any of the data.
Please help me get this code working!
Thanks
function updateSingleValue($ID, $Name)
{
$sql = "UPDATE faculty SET Name=$Name WHERE ID=$ID";
$mysqlConnection = getConnection();
$statement = $mysqlConnection->prepare($sql);
$bReturn = false;
try
{
$statement->execute();
$bReturn = true;
}
catch (PDOException $e)
{
echo $e->getMessage();
}
return $bReturn;
}
function getUpdateResults($tablename)
{
$mysqlConnection = getConnection();
$sql = "SELECT * FROM ".$tablename;
$ResultSet = $mysqlConnection->query($sql);
return $ResultSet;
}
<?php
include_once 'db.php';
if(isset($_POST['update']))
{
$success = updateSingleValue($_POST['ID'], $_POST['Name'], $_POST['update']);
echo $success;
if(!$success)
{
echo 'Sorry, the update failed.';
}
}
$Results = getUpdateResults('faculty');
?>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="POST">
<label id="lblUpdate" for="update">Update</label>
<input type="text" name="update" />
<input type="text" name="ID" />
<input type="text" name="Name" />
<input type="submit" name="submit" value="Submit"/>
</form>
<table border="1">
<tr>
<th>ID</th>
<th>Name</th>
</tr>
<?php
if(isset($Results))
{
foreach($Results as $row)
{
echo '<tr><td>';
echo $row['ID'];
echo '</td><td>';
echo $row['Name'];
echo '</td></tr>';
}
}
?>
</table>

Answer 1

Iv'e noticed something with this:
function getUpdateResults($tablename)
{
$mysqlConnection = getConnection();
$sql = "SELECT * FROM ".$tablename;
$ResultSet = $mysqlConnection->query($sql);
return $ResultSet;
}
try doing concatinating your tablename like this
$t = $tablename;
$sql = "SELECT * FROM $t";

Answer 2

Please close the open connection at the end....
mysql_close($mysqlConnection);