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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.
cookie demo - lock in favourite colour
Further Web Page and Network Handling example from a Well House Consultants training course
More on Further Web Page and Network Handling [link]

This example is described in the following article(s):
   • Passing variable between PHP pages - hidden fields, cookies and sessions - [link]

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

Source code: favcol.php Module: H112

# cookie demo - lock in favourite colour

$colours = array("white","green","red","blue","teal","orange","brown");
$errstr "";
$aok 1;

// --------- Has a favourite colour been previously set?

$mycolour $colours[0];                // Set a fallback
if (isset($_COOKIE["favcolour"])) {
        if (
in_array($_COOKIE["favcolour"],$colours)) {
$mycolour $_COOKIE["favcolour"];
// ---------  Is there a new request for a favourite colour?

if (isset($_REQUEST["ilikes"])) {
        if (
in_array($_REQUEST["ilikes"],$colours)) {
$mycolour $_REQUEST["ilikes"];
        } else {
// deal with error condition
$aok 0;
$errstr .= "Unacceptable colour requested\n";

//      setcookie("favcolour",$mycolour);   for life of browser or ...
$until time() + 3600;         // Live for an hour

// ---------  make up a menu / selection bar to allow favourite colour changes

$picker = array();
foreach (
$colours as $colour) {
$picker[] = "<a href=?ilikes=$colour>$colour</a> ";
$picker implode(" &bull; ",$picker);

# ----------------------------------------------------------------------
<head><title>Setting and remembering a favourite colour (cookie, PHP)</title></head>
<body bgcolor="<?= $mycolour ?>">

<?php if (! $aok ) {  /*  ---- Add error block if necessary ---- */ ?>
There has been a problem with something that was input ... as follows:<br />
<font color=red><?= nl2br($errstr?></font>
<?php ?>

<i>This is a demonstration of setting and using cookies in PHP. In many circumstances,
the build in session handlers (or extended session handlers of frameworks such as
CodeIgniter) will be more appropriate ... and they use cookies internally ... but if
you want a long term memory, or a setting shared between web applications on your
domain, you may wish to use cookies directly - possibly in ADDITION to sessions! </i>
<hr />

<h1>Here are a few of my favourite things</h1>
Raindrops on roses<br />
Whiskers on kittens<br />
Cold cotton mittens<br />
Marmite<br /><br />
Change your favourite colour to ... <?= $picker ?>

<hr />
<i>We've used a cookie in this demonstration to save and re-use your selected
background colour, even if you use other pages before coming back here.  Due to
the demonstration nature of this page, we've set a one hour timeout, but we would
expect that in production use you would use much longer - perhaps years!</i>

Learn about this subject
This module and example are covered on the following public courses:
 * Learning to program in PHP
 * PHP Programming
 * 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 "Further Web Page and Network Handling" training module. You'll find a description of the topic and some other closely related examples on the "Further Web Page and Network Handling" 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.

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

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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.

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