Home Accessibility Courses Twitter The Mouth Facebook Resources Site Map About Us Contact
For 2021 - online Python 3 training - see ((here)).

Our plans were to retire in summer 2020 and see the world, but Coronavirus has lead us into a lot of lockdown programming in Python 3 and PHP 7.
We can now offer tailored online training - small groups, real tutors - works really well for groups of 4 to 14 delegates. Anywhere in the world; course language English.

Please ask about private 'maintenance' training for Python 2, Tcl, Perl, PHP, Lua, etc.
Using an array to sort records off a database
Using MySQL Databases in PHP Pages example from a Well House Consultants training course
More on Using MySQL Databases in PHP Pages [link]

If you're searching for a page where you can try this code, select here

Source code: sort_sql.php Module: H113
<title>PHP - reporting database records unsorted and sorted</title>
<h2>PHP demonstration - sorting outside the database</h2>
The first report that this application outputs is a seriese of records
returned by an SQL query.  In the second report, instead of outputting the
records they are saved into an associative array which is then sorted, and
the records are output in sorted order.   They key to the associative array
is the value on which the items are going to be sorted - and we have added
an extra (incrementing) value onto the end of that key to ensure that it's
unique.  If we didn't do that, and if we had two houses at the same price,
we would loose one from our sorted report.

/* Reading from a database table and displaying records in
the order that they are returned */

print ("<h1>Here are some properties for sale</h1>");
$rs mysql_query("select locate,asking,brief from sales");
while (
$row mysql_fetch_assoc($rs)) {
        print (
"$row[locate] - $row[asking] - $row[brief]<br>");

/* Reading from a database table and displaying records in a
different order */

print ("<h1>Here they are in price order</h1>");
$holder = array();
$rs mysql_query("select locate,asking,brief from sales");
$count 0;
while (
$row mysql_fetch_assoc($rs)) {
$sortvalue $row[asking].".".$count;
$holder[$sortvalue] = "$row[locate] - $row[asking] - $row[brief]<br>";
foreach (
array_keys($holder) as $keyval) {
        print (
A couple of words of caution here: (a) You would be best advised to have
the MySQL do the sorting if you can - more efficient and (b) For a clean
application, I would much rather you had all the PHP at the top of the file,
stored the output into string variables, and output them within a template -
this is very much a sorting demo, and not meant to show best overall practise!

Learn about this subject
This module and example are covered on the following public courses:
 * Learning to program in PHP
 * PHP Programming
 * MySQL
 * PHP Programming
 * Learning to program in PHP
Also available on on site courses for larger groups

Books covering this topic
Yes. We have over 700 books in our library. Books covering PHP are listed here and when you've selected a relevant book we'll link you on to Amazon to order.

Other Examples
This example comes from our "Using MySQL Databases in PHP Pages" training module. You'll find a description of the topic and some other closely related examples on the "Using MySQL Databases in PHP Pages" module index page.

Full description of the source code
You can learn more about this example on the training courses listed on this page, on which you'll be given a full set of training notes.

Many other training modules are available for download (for limited use) from our download centre under an Open Training Notes License.

Other resources
• Our Solutions centre provides a number of longer technical articles.
• Our Opentalk forum archive provides a question and answer centre.
The Horse's mouth provides a daily tip or thought.
• Further resources are available via the resources centre.
• All of these resources can be searched through through our search engine
• And there's a global index here.

Purpose of this website
This is a sample program, class demonstration or answer from a training course. It's main purpose is to provide an after-course service to customers who have attended our public private or on site courses, but the examples are made generally available under conditions described below.

Web site author
This web site is written and maintained by Well House Consultants.

Conditions of use
Past attendees on our training courses are welcome to use individual examples in the course of their programming, but must check the examples they use to ensure that they are suitable for their job. Remember that some of our examples show you how not to do things - check in your notes. Well House Consultants take no responsibility for the suitability of these example programs to customer's needs.

This program is copyright Well House Consultants Ltd. You are forbidden from using it for running your own training courses without our prior written permission. See our page on courseware provision for more details.

Any of our images within this code may NOT be reused on a public URL without our prior permission. For Bona Fide personal use, we will often grant you permission provided that you provide a link back. Commercial use on a website will incur a license fee for each image used - details on request.

You can Add a comment or ranking to this page

© WELL HOUSE CONSULTANTS LTD., 2022: 48 Spa Road • Melksham, Wiltshire • United Kingdom • SN12 7NY
PH: 01144 1225 708225 • EMAIL: info@wellho.net • WEB: http://www.wellho.net • SKYPE: wellho

PAGE: http://www.wellho.net/resources/ex.php • PAGE BUILT: Sun Oct 11 14:50:09 2020 • BUILD SYSTEM: JelliaJamb