PHP to transfer one users data over to another page - php

Question

I have an admin area in an ecommerce website whereby the admin can view all users on the allusers.php page. The users are listed in a table with their personal information, however i have a 'view profile' button near each user whereby if you was to click on it, it would take you to another page where you can view that specific users past orders.
the following is the code i have for allusers.php:
<?php
$result = mysql_query("SELECT * FROM customers ")
or die(mysql_error()); ;
if (mysql_num_rows($result) == 0) {
echo 'There Arent Any Orders Yet';
} else {
echo "<table border='0'><table border width=100%><tr><th>First Name</th><th>Surname</th><th>Address</th><th>E-Mail</th><th>Username</th><th>View Profile</th>";
while($info = mysql_fetch_array($result))
{
echo "<tr>";
echo "<td>" . $info['name']. "</td>";
echo "<td>" . $info['surname']. "</td>";
echo "<td>" . $info['address1']. $info['address2']. $info['city']. $info['postcode']." </td>";
echo "<td>" . $info['email']. "</td>";
echo "<td>" . $info['username']. "</td>";
echo "<td>" . " <a href='view.php'>View</a> </td>";
}
}
echo "</tr>";
echo "</table>";
?>
the view.php page is as follows:
<?php
$result = mysql_query("SELECT * FROM order WHERE ......dont know what to enter here")
or die(mysql_error()); ;
if (mysql_num_rows($result) == 0) {
echo 'There Arent Any Orders For This Customer Yet';
} else {
echo "<table border='0'><table border width=100%><tr><th>Product</th><th>Quantities</th><th>Date</th>";
while($info = mysql_fetch_array($result))
{
echo "<tr>";
echo "<td>" . $info['name']. "</td>";
echo "<td>" . $info['quantity']. "</td>";
echo "<td>" . $info['date']. " </td>";
}
}
echo "</tr>";
echo "</table>";
?>
I have a mysql database with the following fields & tables:
Customers - id, name, surname, address1, address2, city, postcode, email, username, password
Products - serial, name, description, price, picture
Order - id, name, quanitity, price, date, username
Thanks for any help provided

Answer 1

Your code lacks any sort of security mechanisms... This is very bad, especially in an e-commerce setting.
Excusing that, you would pass the username to the view page in the URL.
echo "<td>" . " <a href='view.php?user=" . $info['username'] . "'>View</a> </td>";
In your view page, you would get the parameter from the URL and include it with your query.
if (isset($_GET) && isset($_GET['user'])) {
$user = mysql_real_escape_string($_GET['user']);
} else {
header('Location: allusers.php');
exit(); // boot them back to the previous page.
}
$result = mysql_query("SELECT * FROM order WHERE username = '" . $user . "'")

Answer 2

A simple method could be the follow. Replace this line in alluser.php
echo "<td>" . " <a href='view.php'>View</a></td>";
with this one
echo '<td>View</td>';
and then, in your view.php have
if (isset($_GET['username']) && $_GET['username'] != '')
{
$username = mysql_real_escape_string($_GET['username']);
$result = mysql_query("SELECT * FROM order WHERE username = '$username'");
}
else
{
// No user specified. Do other statements
}
Please note the use of:
The user of the mysql_real_escape_string() function to protect from Sql injection (would be better the use of a prepared statements)
The use of the parameter username in the first page to pass the value of the username to the second page
The use of the $_GET global array to retrieve the parameter

Answer 3

Try this:
allusers.php
<?php
$result = mysql_query("SELECT * FROM customers ")
or die(mysql_error()); ;
if (mysql_num_rows($result) == 0) {
echo 'There Arent Any Orders Yet';
} else {
echo "<table border='0'><table border width=100%><tr><th>First Name</th><th>Surname</th><th>Address</th><th>E-Mail</th><th>Username</th><th>View Profile</th>";
while($info = mysql_fetch_array($result))
{
echo "<tr>";
echo "<td>" . $info['name']. "</td>";
echo "<td>" . $info['surname']. "</td>";
echo "<td>" . $info['address1']. $info['address2']. $info['city']. $info['postcode']." </td>";
echo "<td>" . $info['email']. "</td>";
echo "<td>" . $info['username']. "</td>";
echo "<td>" . " <a href='view.php?user={$info['username']}'>View</a> </td>";
}
}
echo "</tr>";
echo "</table>";
?>
view.php
<?php
$user = mysql_real_escape_string($_GET['user']);
$result = mysql_query("SELECT * FROM order WHERE user = '$user'")
or die(mysql_error()); ;
if (mysql_num_rows($result) == 0) {
echo 'There Arent Any Orders For This Customer Yet';
} else {
echo "<table border='0'><table border width=100%><tr><th>Product</th><th>Quantities</th><th>Date</th>";
while($info = mysql_fetch_array($result))
{
echo "<tr>";
echo "<td>" . $info['name']. "</td>";
echo "<td>" . $info['quantity']. "</td>";
echo "<td>" . $info['date']. " </td>";
}
}
echo "</tr>";
echo "</table>";
?>