Using PHP to add numeric values to two MySQL database rows - php

Question

I have a site in which logged in users can accumulate points which they can later buy with via a shopping cart. The page below is an admin php feature in which an Admin can give points to an individual user (one user at a time for now).
There are three tables involved with this script:
users: contains the users details
tally_point: stores all of the points transactions, both incoming and ordering
reward_points: stores the total amount of points that the user has
The script retrieves the users’ details via a drop down menu and adds the points to the tally point table ok but....
<?php # add-points-ind.php
// This is the main page for the site.
// Include the configuration file for error management and such.
require_once ('./includes/config.inc.php');
// Set the page title and include the HTML header.
$page_title = 'Add Points to User';
include ('includes/header_admin_user.html');
// If no dealer_code variable exists, redirect the user.
if (!isset($_SESSION['admin_int_id'])) {
// Start defining the URL.
$url = 'http://' . $_SERVER['HTTP_HOST']
. dirname($_SERVER['PHP_SELF']);
// Check for a trailing slash.
if ((substr($url, -1) == '/') OR (substr($url, -1) == '\\') ) {
$url = substr ($url, 0, -1); // Chop off the slash.
}
// Add the page.
$url .= '/login.php';
ob_end_clean(); // Delete the buffer.
header("Location: $url");
exit(); // Quit the script.
}
?>
<h1>Add Points to User</h1>
<div id="maincontent_inner">
<div id="maincontent_inner2">
<?php //add-points-ind.php
// This page allows the admin to add points to an individual user
require_once ('mydatabase.php'); // Connect to the database.
if (isset($_POST['submitted'])) { // Check if the form has been submitted.
// Check if points were submitted through the form.
if (is_numeric($_POST['tally_points_in'])) {
$p = (float) $_POST['tally_points_in'];
} else {
$p = FALSE;
echo '<p><font color="red">Please enter the pointås!</font></p>';
}
// Validate the User has been selected
if ($_POST['selected_user'] == 'new') {
// If it's a new categories, add the categories to the database.
$query = 'INSERT INTO tally_points (users_id) VALUES (';
// Check for a last_name.
if (!empty($_POST['users_id'])) {
$query .= "'" . escape_data($_POST['users_id']) . "')";
$result = mysql_query ($query); // Run the query.
$a = mysql_insert_id(); // Get the categories ID.
} else { // No last name value.
$a = FALSE;
echo '<p><font color="red">Please enter the Dealers name!</font></p>';
}
} elseif ( ($_POST['selected_user'] == 'existing') && ($_POST['existing'] > 0))
{ // Existing categories.
$a = (int) $_POST['existing'];
} else { // No categories selected.
$a = FALSE;
echo '<p><font color="red">Please select a registered Dealer!</font></p>';
}
if ($p && $a) { // If everything's OK.
// Add the print to the database.
$query = "INSERT INTO tally_point (users_id, tally_points_in, order_id, total, tally_points_entry_date) VALUES ('$a', '$p', '0', '0', NOW())";
if ($result = mysql_query ($query))
{
// Worked.
echo '<p>The reward product has been added.</p><br />Go back<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />';
} else {
// If the query did not run OK.
echo '<p><font color="red">Your submission could not be
processed due to a system error.</font></p>';
}
} else { // Failed a test.
echo '<p><font color="red">Please click "back" and try again.</font></p>';
}
} else { // Display the form.
?>
<form enctype="multipart/form-data" action="add-points-ind.php" method="post">
<input type="hidden" name="MAX_FILE_SIZE" value="524288" />
<fieldset>
<legend>Add Points Individually:</legend>
<p><b>Select User:</b></p>
<p>
<select name="existing"><option>Select One</option>
<?php // Retrieve all the users details and add to the pull-down menu.
$query = "SELECT users_id, users_sale_id, users_first_name, users_surname FROM users ORDER BY users_surname ASC";
$result = #mysql_query ($query);
while ($row = #mysql_fetch_array ($result, MYSQL_ASSOC)) {
echo "<option value=\"{$row['users_id']}\">{$row['users_sale_id']}: {$row['users_first_name']} {$row['users_surname']} </option>\n";
}
#mysql_close($dbc); // Close the database connection.
?>
</select></p>
<span class="extras"><input type="radio" name="selected_user" value="existing" /> Please confirm this is the correct user</span>
<p><b>Points:</b> <br />
<input type="text" name="tally_points_in" size="10" maxlength="10" /></p>
</fieldset>
<div align="center"><input type="submit" name="submit" value="Submit" /></div>
<input type="hidden"name="submitted" value="TRUE" />
</form>
<?php
} // End of main conditional.
?>
<br class="clearboth" />
End text
</div>
<?php // Include the HTML footer file.
include ('includes/footer_admin_user.html');
?>
... Im having trouble with getting the new points added to the points total field (reward_user_points) in the reward_points table, I have some code below but Im not sure where I am supposed to put it, if anyone has any suggestions please let me know.
<?php
$query = "SELECT reward_user_points FROM reward_points WHERE users_id = $a";
$result = mysql_query($query);
$row = mysql_fetch_array($result, MYSQL_ASSOC);
$TotalPoints = $row['reward_user_points'];
if (#mysql_affected_rows($dbc) == 1) { // Whohoo!
$new_credit = $TotalPoints + $p;
$query = "UPDATE reward_points SET reward_user_points ='$new_credit' WHERE users_id = $a";
$result = #mysql_query($query);
}
?>

Answer 1

Ok, I have to say that I don't understand very well what your trouble is. You say you're having trouble with getting the new points added to the points total field, but could you be a little more specific? Is there any error message returned by php or mysql?