Can't save on the database but my validation is working - php

Question

Good day! I’m making a page where the students can update their profile. So I need a method of validation. YES my validation code is working, but it does not save in the database. And after she/he complete answering the fields that are required he will proceed to another page.
Here’s my code:
<?php
// First we execute our common code to connection to the database and start the session
require("common.php");
// At the top of the page we check to see whether the user is logged in or not
if(empty($_SESSION['user']))
{
// If they are not, we redirect them to the login page.
header("Location: login.php");
// Remember that this die statement is absolutely critical. Without it,
// people can view your members-only content without logging in.
die("Redirecting to login.php");
}
// Everything below this point in the file is secured by the login system
// We can display the user's username to them by reading it from the session array. Remember that because
// a username is user submitted content we must use htmlentities on it before displaying it to the user.
// Database Variables (edit with your own server information)
$server = 'localhost';
$user = 'root';
$pass = '';
$db = 'testing';
// Connect to server and select databse.
mysql_connect("$server", "$user", "$pass")or die("cannot connect");
mysql_select_db("$db")or die("cannot select DB");
$sql ="SELECT * FROM users_info WHERE username = '".$_SESSION['user']['username']."' ";
$result=mysql_query($sql);
if($result === FALSE) {
die(mysql_error()); // TODO: better error handling
}
// define variables and set to empty values
$nameErr = $addressErr = $ageErr = $cellnoErr = $emailErr = $fathers_nameErr = $f_occupationErr = $mothers_nameErr = $m_occupationErr = "";
$name = $address = $age = $cellno = $telno = $email = $fathers_name = $f_occupation = $mothers_name = $m_occupation = "";
while($rows=mysql_fetch_array($result)){
$test=mysql_fetch_array($result);
if(!$result)
{
die("Error: Data not found..");
}
$name = $test['name'];
$address = $test['address'];
$age = $test['age'];
$cellno = $test['cellno'];
$telno = $test['telno'];
$email = $test['email'];
$fathers_name = $test['fathers_name'];
$f_occupation = $test['f_occupation'];
$mothers_name = $test['mothers_name'];
$m_occupation = $test['m_occupation'];
}
if ($_SERVER["REQUEST_METHOD"] == "POST")
{
if (empty($_POST["name"]))
{$nameErr = "Name is required";}
else
{
$name = test_input($_POST["name"]);
// check if name only contains letters and whitespace
if (!preg_match("/^[a-zA-Z ]*$/",$name))
{
$nameErr = "Only letters and white space allowed";
}
}
if (empty($_POST["address"]))
{$addressErr = "Address is required";}
else
{$address =($_POST["address"]);}
if (empty($_POST["age"]))
{$ageErr = "Age is required";}
else
{$age = ($_POST["age"]);}
if (empty($_POST["cellno"]))
{$cellnoErr = "Cellphone Number is required";}
else
{$cellno = ($_POST["cellno"]);}
if (empty($_POST["email"]))
{$emailErr = "Email is required";}
else
{
$email = test_input($_POST["email"]);
// check if e-mail address syntax is valid
if (!preg_match("/([\w\-]+\#[\w\-]+\.[\w\-]+)/",$email))
{
$emailErr = "Invalid email format";
}
}
if (empty($_POST["fathers_name"]))
{$fathers_nameErr = "Father's Name is required";}
else
{$fathers_name = ($_POST["fathers_name"]);}
if (empty($_POST["f_occupation"]))
{$f_occupationErr = "Father's Occupation is required";}
else
{$f_occupation = ($_POST["m_occupation"]);}
if (empty($_POST["mothers_name"]))
{$mothers_nameErr = "Mother's Name is required";}
else
{$mothers_name =($_POST["mothers_name"]);}
if (empty($_POST["m_occupation"]))
{$m_occupationErr = "Mother's Occupation is required";}
else
{$m_occupation =($_POST["m_occupation"]);}
}
function test_input($data)
{
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
mysql_query ("UPDATE `users_info` SET `name` ='$name', `address` ='$address',`age` ='$age', `cellno` ='$cellno' , `telno` ='$telno', `email` ='$email', `fathers_name` ='$fathers_name', `f_occupation` ='$f_occupation', `mothers_name` ='$mothers_name', `m_occupation` ='$m_occupation' WHERE username = '".$_SESSION['user']['username']."' ") or die(mysql_error());
header("Location: myprofile.php");
}
?>

Answer 1

You assign the variables and then redirect the page, maybe you should put them in an session also in order to shown them in the form.