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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.
Display an image from a MySQL database in a web page via PHP

There's lots of clever scripts around to tell you how to get images in and out of databases, but nothing simple to show you the principles of including such an image via (say) PHP in a web page. So here goes.

you need TWO URLs - you need the HTML page that's going to contain the image, AND you need a second URL - PHP in my example - that's going to retrieve the image and feed it out as part of the page. You CANNOT feed out both the HTML and the image from the same http request.

Here's a sample HTML page we're going to include an image in:

<html>
<head>
<title>Demo of Database Image in a page</title>
</head>
<body>
Here is your picture:<br>
<img src=picscript.php?imname=potwoods><br>
Example by Well House Consultants
</body>
</html>


Then you need the PHP script - called picscript.php in the same directory in my example:

<?php
mysql_connect("localhost","wellho","xxxxxxx");
mysql_select_db("wellho");
$image = stripslashes($_REQUEST[imname]);
$rs = mysql_query("select * from im_library where filename=\"".
addslashes($image).".jpg\"");
$row = mysql_fetch_assoc($rs);
$imagebytes = $row[imgdata];
header("Content-type: image/jpeg");
print $imagebytes;
?>


If you want to try it out, then the HTML page is here.

Want to take this further?

As a next step, I would validate the connection after the mysql_connect, and check that an image really had been returned by the mysql_query ... substituting a default image if not.

We host a complete working example of image upload, save to database, select from database and display all via a PHP script. See article on the subject

There's a forum discussion here.
(written 2006-11-22, updated 2008-05-04)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
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  [361] Binary Large Objects or bars - (2005-06-27)
  [375] Oops - I got my initial database design wrong - (2005-07-12)
  [494] MySQL - a score of things to remember - (2005-11-12)
  [515] MySQL - an FAQ - (2005-12-03)
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  [918] Databases needn't be frightening, hard or expensive - (2006-11-08)
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  [2204] Images in a database? How big is a database? (MySQL) - (2009-05-28)
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  [3270] SQL - Data v Metadata, and the various stages of data selection - (2011-04-29)
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H999 - Additional PHP Material
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  [239] What and why for the epoch - (2005-03-08)
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  [337] the array returned by preg_match_all - (2005-06-06)
  [372] Time calculation in PHP - (2005-07-08)
  [468] Stand alone PHP programs - (2005-10-18)
  [483] Double Dollars in PHP - (2005-11-02)
  [493] Running a Perl script within a PHP page - (2005-11-12)
  [563] Merging pictures using PHP and GD - (2006-01-13)
  [603] PHP - setting sort order with an associative array - (2006-02-13)
  [665] PHP Image viewing application - (2006-04-01)
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H113 - Using MySQL Databases in PHP Pages
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  [572] Giving the researcher power over database analysis - (2006-01-22)
  [581] Saving a MySQL query results to your local disc for Excel - (2006-01-29)
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Snagging
Winter at Well House Manor - Open Houses
Swipe cards for hotel rooms - Security issues
Bratton and Edington new town, Wiltshire
Display an image from a MySQL database in a web page via PHP
Global, Superglobal, Session variables - scope and persistance in PHP
Autumn leaves in Wiltshire - Potterne
Clustering, load balancing, mod_rewrite and mod_proxy
Course Joining package - updated
A tale of a wee wall
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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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It was quite informative.it helped me a lot. [#3467]

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