473,837 Members | 1,545 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Loading png images into a mysql table/database

Hello Members,

I am setting up a photo website. I have decided to use PHP and MySQL.
I can load jpeg files into the table (medium blob, or even longtext)
and get the image(s) to display without a problem. I am using
chunk_split(dat a) and the base64_encode and base64_decode on the files.

I do a select from the database, and then echo the image (with
header(Content Type: image/jpeg)
and the decoded image displays fine. Yes, I have tried header(Content
Type: image/png), without
success.

My problem is png images. Is there something that I need to do
different in terms on reading/encodeing/decodeing the png image? I am
putting its "binary" data into the db table.
But when I do a select on a png image - it never displays in the
browser.

I am not using file/path names as references, but actually putting the
image in the db.

Here is a sample of code I use to insert the data into the table, and
to select the code from the table.

load image(s):
<?php
while ($file = readdir($dir_ha ndle))
{
$filetyp = substr($file, -3);
if ($filetyp == 'png' OR $filetyp == 'jpg')
{
$handle = fopen($path . "/" . $file,'r');
$file_content = fread($handle,f ilesize($path . "/" . $file));
fclose($handle) ;

$encoded = chunk_split(bas e64_encode($fil e_content));
$sql = "INSERT INTO images SET sixfourdata='$e ncoded'";
mysql_query($sq l);
}
}
?>

display images:

<?php
$result = @mysql_query("S ELECT * FROM images WHERE id=" . $img . "");

if (!$result)
{
echo("Error performing query: " . mysql_error() . "");
exit();
}

while ( $row = mysql_fetch_arr ay($result) )
{
$imgid = $row["id"];
$encodeddata = $row["sixfourdat a"];
}
?>

<?php
//echo base64_decode($ encodeddata);
echo $encodeddata;
?>

This process seems to always work with jpegs.

Thanks

ewholz

Dec 22 '06
10 13426
ha******@gmail. com wrote:
>>Hello Members,

I am setting up a photo website. I have decided to use PHP and MySQL.
I can load jpeg files into the table (medium blob, or even longtext)
and get the image(s) to display without a problem. I am using
chunk_split(d ata) and the base64_encode and base64_decode on the files.

I do a select from the database, and then echo the image (with
header(Conten t Type: image/jpeg)
and the decoded image displays fine. Yes, I have tried header(Content
Type: image/png), without
success.

My problem is png images. Is there something that I need to do
different in terms on reading/encodeing/decodeing the png image? I am
putting its "binary" data into the db table.
But when I do a select on a png image - it never displays in the
browser.

I am not using file/path names as references, but actually putting the
image in the db.

Here is a sample of code I use to insert the data into the table, and
to select the code from the table.

load image(s):
<?php
while ($file = readdir($dir_ha ndle))
{
$filetyp = substr($file, -3);
if ($filetyp == 'png' OR $filetyp == 'jpg')
{
$handle = fopen($path . "/" . $file,'r');
$file_conte nt = fread($handle,f ilesize($path . "/" . $file));
fclose($handl e);

$encoded = chunk_split(bas e64_encode($fil e_content));
$sql = "INSERT INTO images SET sixfourdata='$e ncoded'";
mysql_query($sq l);
}
}
?>

display images:

<?php
$result = @mysql_query("S ELECT * FROM images WHERE id=" . $img . "");

if (!$result)
{
echo("Error performing query: " . mysql_error() . "");
exit();
}

while ( $row = mysql_fetch_arr ay($result) )
{
$imgid = $row["id"];
$encodeddat a = $row["sixfourdat a"];
}
?>

<?php
//echo base64_decode($ encodeddata);
echo $encodeddata;
?>

This process seems to always work with jpegs.

Thanks

ewholz


Code to Import images , with HTML goodness

===SNIP START===
<table>
<tr>
<td Colspan="2"><h3 >Insert Image</h3></td>
</tr>
<tr><form method="post" ENCTYPE="multip art/form-data" name="theForm">
<td>Image File</td>
<td><input type=file size="40" name=image></td>
</tr>
<tr>
<td colspan="2" align="center"> <input type="submit"
value="Upload"> </td>
</tr>
</form>
</table>
<?php
if(!$_FILES)die ();
require_once('./pathtodatabasec onnect.php');

$iname = $_FILES['image']['name'];

//Suck that file into a buffer
ob_start();
$contents = readfile($_FILE S['image']['tmp_name']);
$dump = ob_get_contents ();
ob_end_clean();
$data = unpack("H*hex", $dump);
$buf = $data['hex'];

//Check to see what we got it the dB already
$query = "select id from $database.image table where id = '$iname'";
$result = mysql_query($qu ery) or die();
$line = mssql_fetch_arr ay($result);

if($line == "") {
$query = "insert into $database.image stable (id, data) values
('$iname', 0x$buf)";
$status = "inserted into";
} else {
$query = "UPDATE $database.rober t.imagetable set data = 0x$buf where
id = '$iname'";
$status = "updated in";
}
mysql_query($qu ery) or die("error during query: $query");

?>
<dd>Image was <?echo $status;?databa se
<dd>Image Uploaded
<dd><img src="GetImage.p hp?image=<?=$in ame;?>">

</body>
</html>
===SNIP END===

Code to read images to screen

NOTE: This code is expecting to be called from an IMG tag: <img
src="phpfile.ph p?image=1">
===SNIP START===
<?php
require_once('./pathtodatabasec onnect.php');
Include a type calumn
function getImage($data) {
if(substr($data , 0, 3) == "GIF") return "gif";
if(substr($data , 0, 2) == "BM") return "bitmap";
if(substr($data , 6, 4) == "JFIF") return "jpeg";
if(substr($data , 1, 3) == "PNG") return "png";
if(substr($data , 0, 2) == "II" || substr($data, 0, 2) == "MM") return
"tiff";
return 1;
}
extract($_GET);
$query = "SELECT data from $database.image table where id = '$image'";
$result = mysql_query($qu ery) or die();
$data = mysql_result($r esult,0);
$len = strlen($data);
$type = getImage($data) ;
header("Content-type: $type");
header("Content-length: $len");
echo $data;
?>
===SNIP END===

NOTE: Loading images from a dB is really lame! I tried this (as above
code shows) and while it does work, it is extreamly slow and taxing on
your server unessecarly. I would suggest have a directory called
"images" and having a list of that directory in the database, that
would be much faster!

Example:
===SNIP START===
<img src="getImage.p hp?image=1">
<?php //this is are fake "getImage.p hp" file ;)
require_once('p athtodatabasefi le.php');
function getImage($data) {
if(substr($data , 0, 3) == "GIF") return "gif";
if(substr($data , 0, 2) == "BM") return "bitmap";
if(substr($data , 6, 4) == "JFIF") return "jpeg";
if(substr($data , 1, 3) == "PNG") return "png";
if(substr($data , 0, 2) == "II" || substr($data, 0, 2) == "MM") return
"tiff";
return 1;
}
$query="SELECT name from $database.image table WHERE value =
".$_GET['image'].";";
$name = mysql_result(my sql_query($quer y),0);
$buf=readfile(" ./images/$name");
$len=strlen($bu f);
$type=getImage( $buf);
header("Content-type: $type");
header("Content-length: $len");
echo $buf;
===SNIP END===

Wow, hope you can digest all that!

Cheers,
hackajar (at not spam, please don't spam) gmail (PLEASE NO SPAM) com
eholz1 wrote:
(Top posting fixed)

It was probably slow becasue your code is so inefficient.

Some suggestions:

1. Include the type of file as a column of the table.
2. Include the length as another column.
3. Don't use file names. Rather, use an autoincrement column for an id.
Make that id the primary key and load the image by id.
4. There is no need to use ob_start/ob_end_clean. Rather, fopen() the
file (in binary mode) and fread() it into the buffer.

These changes will speed things up a lot.

Also, your content-type is incorrect. It should be "image/gif",
"image/bitmap", etc.

I use images from a database all the time, and they work fine. They
also have the advantage that if you're using innodb tables, you can
guarantee the integrity of the database (what happens if an image file
is deleted, for instance?)

P.S. Please don't top post.

--
=============== ===
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
js*******@attgl obal.net
=============== ===
Dec 27 '06 #11

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

3
3513
by: Srdjan Pejic | last post by:
Hello, I have a problem that I have not been able to solve, even after searching the web. I have stored couple of images in the MySQL database and I am trying to get them displayed on a web page with PHP. Now, before we go any further, I want to make it clear that I am very aware of the current debate about storing images in the database. I understand both sides, however this is something I want to do for fun, as well as good learning.
2
1817
by: gsb | last post by:
Not sure is best place to ask, but... What should the mySQL table look like to save and extract a series of images. I want to "insert" an image by name (string) and later "select" and send it to a web page. Thanks, gsb
15
2338
by: Geoff Cox | last post by:
Hello I have following type of code in the header function pre_load_pics() { if (document.images) { var image1 = new Image(400,265); image1.scr = "pic1.jpg";
9
2802
by: Dejan | last post by:
Hy, Sorry for my terreble english I have this simple code for deleting rows in mysql table... Everything works fine with it. So, what do i wanna do...: my sql table looks something like this: id Name Surname pictr0 picrt1 pictr2 pictr3
11
3832
by: kennthompson | last post by:
Trouble passing mysql table name in php. If I use an existing table name already defined everything works fine as the following script illustrates. <?php function fms_get_info() { $result = mysql_query("select * from $tableInfo") ; for ($i = 0; $i < mysql_num_rows($result); $i++) {
5
6858
by: yeoj13 | last post by:
Hello, I have a db2load script I'm using to populate a large table. Ideally, my target table is required to have "Not Null" constraints on a number of different columns. I've noticed a huge performance hit when I load the target table with "Not Null" constraints as compared to loading a target table without the constraints.
1
1789
osward
by: osward | last post by:
Hi all, I got code over the net for paging mysql table, it provides Prev pages Next link at the bottom of the table. However, I have a pretty large table to display (average over 400+ rows). Even when I limited the rows to display 30, It still have over 10 page link display between Prev and Next link. Following are code to display the links echo "<center>"; // Build First & Previous page Link if($page > 1){ $prev = ($page -...
3
7412
by: printline | last post by:
Hello All I need a little help with a phph script to display some specific data from a mysql table. I have a mysql table with 4 columns and 10 rows. I want to display fx. data from row 4, 6, 8 and 10. I can display either the first row or all the rows using the below code: $row = mysql_fetch_array($result) or die(mysql_error()); echo $row. " - ". $row. " <img src=images/arlon.jpg /> ". $row. " - ". $row;
4
9102
by: Peter910 | last post by:
Brothers in the house. I plan developing an online database application with PHP and MYSQL. In my database design structure, I plan to have maximum of 50 columns and maximum of 20,000 rows in a certain table. But then I will to like have the experience of the members in the house. What exactly is the maximum number of rows and columns in a MYSQL database table. I will be glad to receive if there is any other restriction(s)/limit(s)...
0
9682
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
10563
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
10621
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
10267
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
9392
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
0
5668
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
0
5845
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
4474
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
3
3123
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.