a very simple example (with no form validation):
<?php
if (!isset($_POST['submit']))
{
echo '
<form action="" method="POST">
data: <input type="text" name="data"><br>
quantity: <input type="text" name="quantity"><br>
<input type="submit" name="submit" value="submit">
</form>
';
}
else
{
for ($i = 1; $i <= $_POST['quantity']; $i++)
{
$sql = "INSERT INTO table SET data = '" . $_POST['data'] . "'";
// run query here
}
}
?>