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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.
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Image map controlled by PHP script
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):
   • Image maps for navigation - a straightforward example - [link]

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

This example references the following resources:
http://www.wellho.net/resources/contact.html
http://www.wellho.net/course/phfull.html
http://www.wellho.net/resources/ex.php4?item=h112/imap.php

Source code: imap.php Module: H112
<?php

/* Image map demonstration. Takes an image of thumbnails (4 x 4),
and depending where you click on that image enlarges the appropriate
smaller image. Clicking on the enlarged image chooses another image
at random */

$matrix = array(array(1,10,11,12),array(13,14,15,16),
        array(
2,3,4,5),array(6,7,8,9));
$pixelheight 487;
$pixelwidth 440;

# Was a pick made on an image?
# If so, save its position. If not, choose a random position

if (ereg('^([[:digit:]]+),([[:digit:]]+)$',
        
$_SERVER["QUERY_STRING"],$gotten)) {
        
$vert $gotten[2];
        
$horz $gotten[1];
} else {
        
$vert rand(0,$pixelheight-1);
        
$horz rand(0,$pixelwidth-1);
}

$row floor($vert 4.0 $pixelheight);
$col floor($horz 4.0 $pixelwidth);

$image "ecard".$matrix[$row][$col].".jpg";
///////////////////////////////////////////////////////////////////
?>
<html>
<head>
<title>An image map - selecting a thumbnail</title>
</head>
<body bgcolor=#FFFFCC>
<h1>Image number <?= $matrix[$row][$col?></h1>
<center><a href=<?= $PHP_SELF ?>>
<img src=/pix/<?= $image ?> border=0></a>
</center>
This is the image from row <?= $row+1 ?>, column <?= $col+1 ?>
 of the thumbnail map below. Click on the image above for another
image at random, or on the image below if you would like to see
a particular image.
<hr>
<h2>Image Picker</h2>
<center><a href=<?= $PHP_SELF ?>>
<img src=/pix/thumbcards.jpg ismap border=0></a>
</center>
You can click on this image to see an enlargement of an image of
your choice.<br><br>
&copy;
<a href=http://www.wellho.net/resources/contact.html>
Well House Consultants
</a>, <?= date("Y"?><br>
Example from a training course - see
<a href=http://www.wellho.net/course/phfull.html>course</a> and
<a href=http://www.wellho.net/resources/ex.php4?item=h112/imap.php>source
</a><br>
</body>
</html>

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.

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.

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