Update database from inserted table fields - php

Question

I have made a table with editable fields and i have to add functionality to the update button. I have looked up many posts but cant seem to figure out how it works.
Heres what i have at this moment:
<?php
if (isset($_GET['update'])) {
$query = mysql_query("UPDATE iekartas SET
iernosauk='$Ierices_Nosaukums', tips='$Tips', razotajs='$Razotajs',
izgatdat='$Izgatavosanas_datums', adrese='$Adrese' where id='$Iekartas_ID'", $connection);
}
$query = mysql_query("select * from iekartas", $connection);
while ($row = mysql_fetch_array($query)) {
echo "<b><a href='iekartas.php?update={$row['Iekartas_ID']}'>{$row['Ierices_Nosaukums']}</a></b>";
echo "<br />";
}
?>
<tr>
<form action="ierices.php" method="post">
<td><input class="checkbox" type="checkbox" id="<?php echo $row['Iekartas_ID'] ?>" name="id[]"></td>
<td> <input type="text" name="iernosauk" value=" <?php echo $row["Ierices_Nosaukums"]; ?>"></td>
<td> <input type="text" name="tips" value=" <?php echo $row["Tips"]; ?>"></td>
<td> <input type="text" name="razotajs" value=" <?php echo $row["Razotajs"]; ?>"></td>
<td> <input type="text" name="izgatdat" value=" <?php echo $row["Izgatavosanas_datums"]; ?>"></td>
<td> <input type="text" name="adrese" value=" <?php echo $row["Adrese"]; ?>"></td>
<td> <input type="hidden" name="id" value=" <?php echo $row["Iekartas_ID"]; ?>"></td>
<?php
$i++;
}
?>
<button type="button" action="update.php" name="updatedb" class="btn btn-danger" id="updatedb" value=update>Atjaunot</button>
</tr>
</form>

Answer 1

Button is client side so your "update.php" won't be triggered when you click on button. What you have to do is change your button type to submit so your form will actually send a POST request when you click on the button and it will call the action on the form (ierices.php)
<form action="ierices.php" method="post">
...
<button type="submit" class="btn btn-danger" id="updatedb">Atjaunot</button>
</form