0t@k-B@L! » mysql

Display Images from mySQL Binary Data

andi — Tue, 10 Nov 2009 15:11:14 +0000

This tutorial will show you how to display your images (binary data) which has been saved in your mySQL database.

It’s very very simple.. so.. simple…. (read also: Storing Images/Binary Files to mySQL in PHP)

First of all we must connect to our database

PHP Code:


$username = "";

$password = "";

$host = "localhost";

$database = "";

$username = “”; – It’s your database’s username
$password = “”; – It’s your database’s password
$host = “localhost”; – It’s your database’s host, usually it’s localhost but it can be something else also
$database = “”; – It’s your database

Now let’s connect to the database

PHP Code:

 @mysql_connect($host, $username, $password) or die("Can not connect to database: ".mysql_error());

@mysql_select_db($database) or die("Can not select the database: ".mysql_error());

@mysql_connect($host, $username, $password) or die(“Can not connect to database:”.mysql_error()); – This connects to your database

@mysql_select_db($database) or die(“Can not select the database: “.mysql_error()); – This will select your database

Now let’s get our id

PHP Code:

$id = $_GET['id'];

It will get a id from an URL. blabla.com

So.. your id will be 3 and it will show an image which id is 3

PHP Code:

 if(!isset($id) || empty($id)){

die("Please select your image!");

}else{

if(!isset($id) || empty($id)){ – If this ID in your url is empty like ?id= of if it’s not even set
die(“Please select your image!”); – lets display an error
}else{ – But if it is set let’s continue with showing our image

PHP Code:

$query = mysql_query("SELECT * FROM tbl_images WHERE id='".$id."'");

$row = mysql_fetch_array($query);

$content = $row['image'];

$query = mysql_query(“SELECT * FROM tbl_images WHERE id=’”.$id.”‘”); – Now let’s select the blob from the table where id is $id (for example: 3)

$row = mysql_fetch_array($query); – Let’s gather our info about image which id is $id into one variable

$content = $row['image']; – Get’s the blob from our table
Now let’s display our image

PHP Code:

header('Content-type: image/jpg');

echo $content;

}

header(‘Content-type: image/jpg’); – This tells to the browser and to the server that this file will be a jpg file

echo $content; – This will display our blob..

} – Ends else
Okay.. now here’s our full script.

PHP Code:


$username
= "";

$password = "";

$host = "localhost";

$database = "";
@
mysql_connect($host, $username, $password) or die("Can not connect to database: ".mysql_error());
@
mysql_select_db($database) or die("Can not select the database: ".mysql_error());
$id = $_GET['id'];
if(!isset(
$id) || empty($id)){

die("Please select your image!");

}else{
$query = mysql_query("SELECT * FROM tbl_images WHERE id='".$id."'");

$row = mysql_fetch_array($query);

$content = $row['image'];
header('Content-type: image/jpg');

echo $content;
}

?>

It works perfectly

Enjoy… If you have questions then please feel free to ask

Storing Images/Binary Files to mySQL in PHP

andi — Tue, 10 Nov 2009 13:58:06 +0000

It is possible for us to store/save our images (binary files) into a mySQL database in PHP. In this article, we will discuss about “how to store images, audio, or another binary files into mySQL database with PHP script”. But, before we continue to the further step, you might want to consider some reason of why we should and why we shouldn’t store binary files in a database:

Reasons to store your images (binary files) in a database:

Storing in a database allows better security for your files and images.
Eliminates messy directory and file structures (this is especially true when users are allow to contribute files).
Files/Images can be stored directly linking to user or advertiser information.

You may want to reconsider storing your binary files in the database. Here are some reason you may not want to:

You can’t directly access your files using standard applications such as FTP.
If you database becomes corrupt, so do your files.
Migrating to a new database is made more difficult
Pulling images from a database and displaying them is slower than using file access.

After considering above reasons, you may continue to the first step of this tutorial.

Database Type and Connection

I assume that you already create a mySQL database named “binary”. We created two tables, one the primary ID (of the row/entry) and the binary BLOB. A BLOB is a binary large object that can hold a variable amount of data. The four BLOB types are TINYBLOB, BLOB, MEDIUMBLOB, and LONGBLOB. These differ only in the maximum length of the values they can hold. The four TEXT types are TINYTEXT, TEXT, MEDIUMTEXT, and LONGTEXT. These correspond to the four BLOB types and have the same maximum lengths and storage requirements.

You’ve now created your database and are ready to upload binary files to it. In this case, images. Next we will create a simple upload script.

Creating the HTML

Creating the user interface where you or your visitors will upload files is very simple. Using basic HTML and relying on the browser to do most of the heavy lifting you can easily create an upload form. Here is the one we will use:

HTML Code:

"multipart/form-data" action="insert.php" method="post" name="changer">

"MAX_FILE_SIZE" value="102400" type="hidden">
"image" accept="image/jpeg" type="file">

"Submit" type="submit">

Copy this code into a file and save it as add.html

The code above allows the uses to browse for a file and select any image/jpeg file type. Once selected and the submit button is pressed the image contents are forwarded to PHP script, insert.php

Inserting the Image into MySQL

Create a new file named insert.php. If you change the name of this file you will also need to change the action=”" part in your HTML file above. Open the file in your favorite text editor or PHP IDE.

Write or copy/paste this code into your file:

PHP Code:



 // Create MySQL login values and

// set them to your login information.

$username = "YourUserName";

$password = "YourPassword";

$host = "localhost";

$database = "binary";
// Make the connect to MySQL or die

// and display an error.

$link = mysql_connect($host, $username, $password);

if (!$link) {

die('Could not connect: ' . mysql_error());

}
// Select your database

mysql_select_db ($database);

The above code sets your connection variables, creates a connection to MySQL and selects your database (binary if you followed my instructions above). Next we need to read the form data and insert it into the database.

PHP Code:

// Make sure the user actually // selected and uploaded a file if (isset($_FILES['image']) && $_FILES['image']['size'] > 0) {

// Temporary file name stored on the server
$tmpName = $_FILES['image']['tmp_name'];

// Read the file
$fp = fopen($tmpName, ‘r’);
$data = fread($fp, filesize($tmpName));
$data = addslashes($data);
fclose($fp);

// Create the query and insert
// into our database.
$query = “INSERT INTO tbl_images ”;
$query .= “(image) VALUES (‘$data’)”;
$results = mysql_query($query, $link);

// Print results
print “Thank you, your file has been uploaded.”;

}
else {
print “No image selected/uploaded”;
}

// Close our MySQL Link
mysql_close($link);
?>

The PHP code above takes the user selected image, reads it with fopen and stores the data in a variable named $data. The binary data is then inserted into our database for retrieval at a later time.

Save the file above and access add.html via your browser. Select an image file and upload it.

I will post the next stage of this tutorial: “How to read binary data from database“