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

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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.

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