Search a database of images

Using MySQL Databases in PHP Pages example from a Well House Consultants training course
More on Using MySQL Databases in PHP Pages [link]

This example references the following resources:
http://www.wellho.net/course/phfull.html
http://www.wellho.net/net/ofcourse.html

Source code: picclim.php Module: H113

<?php
# Search and display images

/* This demonstration selects and displaye images from our
library of images associated with "The Horse's Mouth", our
Wiltshire wiki, and more. */

mysql_connect("localhost","wellho","xxxxxxx");
mysql_select_db("wellho");

$perpage = 20;
$html = "";
$startat = $_REQUEST[page] * $perpage;
$limlim = "%".$_REQUEST[look4]."%";

$q = mysql_query("select count(iid) from im_library
        where descriptor like '$limlim'");
$row = mysql_fetch_array($q);
$havesome = $row[0];
$pages = floor(($row[0]-1) / $perpage) +1 ;

$q = mysql_query("select * from im_library
        where descriptor like '$limlim'
        order by iid desc
        limit $startat,$perpage");

while ($row = mysql_fetch_assoc($q)) {
        $text = strip_tags($row[entry_text]);
        $text = substr($text,0,300);
# Note - we're using mod_rewrite to pretend that images
# are really plain files. You may want to vary this
        $html .= "$row[iid] - <a href=/pix/$row[filename]
                target=pix>$row[descriptor]</a></br>";
        };

$lynx = "Please choose the next page you want to view:";
for ($k=0; $k<$pages; $k++) {
        if ($k != $_REQUEST[page]) {
         $lynx .= " <a href=$PHP_SELF"."?page=$k&look4=".
        urlencode(stripslashes($_REQUEST[look4])).">".($k+1)."</a>";
        } else {
         $lynx .= " <b>--".($k+1)."--</b>";
        }
}
if ($pages < 2) {
        $lynx = "All results shown on this page";
}
if ($havesome == 0) {
        $lynx = "Sorry - no pictures matched. Please change your search string";
        }
if ($_REQUEST[look4]) {
        $ttl = htmlspecialchars(stripslashes($_REQUEST[look4]))." -
                an index of pictures";
        $for = "Your search was for <b>".htmlspecialchars
                (stripslashes($_REQUEST[look4]))."</b>";
} else {
        $ttl = "An index of pictures";
        $for = "You have not limited your search - all pictures selected";
}
?>
<html><head>
<title><?= $ttl ?></title>
<body><?= $for ?><br>
<h2>Here are the entries you selected - page <?= $_REQUEST[page]+1 ?>:</h2><br>
<?= $html ?>
<?= $lynx ?>
<h2>Searching Pictures on the Well House Consultants web site</h2>
We've got over a thousand pictures on this web site - everyting from pictures
of training courses to many, many places in Wiltshire and further afield ...
and many of them are titled in our database. This page demonstrates how our
picture database can be searched.<br><br>
<form>Search only for pictures with titles including ... <input name=look4
value="<?= htmlspecialchars(stripslashes($_REQUEST[look4])) ?>">
(Please leave box empty to select all titles)
<input type=submit></form><br><br>
This page is from the web site of <a href=http://www.wellho.net>Well House
Consultants</a> who provide Open Source computer training. Program written
/ developed as a demonstration during a
<a href=http://www.wellho.net/course/phfull.html>PHP course</a>.
</body></html>
<?php

/* Footnote / comment. This example does not include the
code to upload images, add them to the database, or create
the database tables. Other examples are available elsewhere
on our site to cover this. The Summer, 2006 issue of
"Of Course" is a good place to start - download it from
        http://www.wellho.net/net/ofcourse.html

Table creation command:

create table im_library (
     iid int primary key not null auto_increment,
     filename text,
     imgdata longblob,
     descriptor text)
*/

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.

Web site author

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

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.

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.