php mysql leading my update and delete page to homepage - php

Question

these are the codes
where do you think I should insert the header (Location:'home.php')
I tried using after the if statements, these are the codes
else {
try {
header('Location: home.php');
}
but it directly goes to home.php even when I haven't clicked the update button
<?php
if (isset($_POST['update'])){
$UpdateQuery = "UPDATE registry SET db_id = '$_POST[db_id]', db_name =
'$_POST[db_name]', db_age = '$_POST[db_age]', db_gender =
'$_POST[db_gender]', db_birthdate = '$_POST[db_birthdate]', db_phone =
'$_POST[db_phone]', db_address = '$_POST[db_address]'
WHERE db_id = '$_POST[hidden]'";
mysql_query($UpdateQuery);
}
$sql = "SELECT * FROM registry";
$query = mysql_query($sql) or throw_ex(mysql_error()); ;
echo"<h2><center>Employee Masterlist</center></h2>";
echo "<table class = \"form\" border = \"1\" cellspacing = \"3\">";
echo "<tr>";
echo "<th>Employee ID</th>";
echo "<th>Name</th>";
echo "<th>Age</th>";
echo "<th>Gender</th>";
echo "<th>Birthdate </th>";
echo "<th>Phone No. </th>";
echo "<th>Address </th>";
echo "</tr>";
while($row = mysql_fetch_array($query))
{
echo "<form action=update.php method=post>";
echo "<tr>";
echo "<td>" . "<input id=input-up type=text name=db_id
value=" . $row['db_id'] . "> </td>";
echo "<td>" . "<input id=input-up type=text name=db_name
value=" . $row['db_name'] . "> </td>";
echo "<td>" . "<input id=input-up type=text name=db_age
value=" . $row['db_age'] . "> </td>";
echo "<td>" . "<input id=input-up type=text
name=db_gender value=" . $row['db_gender']. "> </td>";
echo "<td>" . "<input id=input-up type=text
name=db_birthdate value=" . $row['db_birthdate'] . "> </td>";
echo "<td>" . "<input id=input-up type=text
name=db_phone value=" . $row['db_phone'] . "> </td>";
echo "<td>" . "<input id=input-up type=text
name=db_address value=" . $row['db_address'] . "> </td>";
echo "<input type=hidden name=hidden value=" .
$row['db_id'] . "> </td>";
echo "<td>" . "<input class=send_btn type=submit
name=update value=Update". "> </td>";
echo "</tr>";
echo "</form>";
}
echo"</table>";
mysql_close();
?>
</div>
</body>
</html>

Answer 1

You should add it after query is executed.
Here is the code
if (isset($_POST['update'])){
$UpdateQuery = "UPDATE registry SET db_id = '$_POST[db_id]', db_name =
'$_POST[db_name]', db_age = '$_POST[db_age]', db_gender =
'$_POST[db_gender]', db_birthdate = '$_POST[db_birthdate]', db_phone =
'$_POST[db_phone]', db_address = '$_POST[db_address]'
WHERE db_id = '$_POST[hidden]'";
mysql_query($UpdateQuery);
//redirect to home.php
header('Location: home.php');
}