problem by displaying images stored in a MySQL database? - php

Question

i have images in my blob field in database i use blow colde for displaying image but
it does not show any pic , someone could tell me where is my wrong?
this is my model:
public function getListUser() {
$select = $this->select()
->order('lastname DESC');
$adapter = new Zend_Paginator_Adapter_DbTableSelect ($select);
return $adapter;
}
this my controller:
$userModel = new Admin_Model_User();
$adapter = $userModel->getListUser();
$paginator = new Zend_Paginator ($adapter);
$paginator->setItemCountPerPage(1);
$page = $this->_request->getParam('page', 1);
$paginator->setCurrentPageNumber($page);
$this->view->paginator = $paginator;
this my view code:
<td style="width: 20%;"> <?php
echo $this->lastname ?> </td>
<td style="width: 20%;"><?php header("Content-type: image/gif"); print $this->image; ?></td>

Answer 1

This is not how you can display your image.
Your code should look something like this.
<td style="width: 20%;"> <?php
echo $this->lastname ?> </td>
<td style="width: 20%;"><img src="/link-to-php-that-shows-image.php?id=123" /></td>
Now, in the php file for example (link-to-php-that-shows-image.php). You get the image field from the database and display it. Example..
<?php
$image = //get image from database, based on id etc.
header("Content-type: image/gif");
print $image;
?>

Answer 2

You cannot do this line of code.
<td style="width: 20%;">
<?php header("Content-type: image/gif"); print $this->image;?>
</td>
It's because, <td style="width: 20%;"> is html element which gets printed before image is outputed and headers are send to output image, so you get error
Error:: Cannot modify header information - headers already sent by ..
But you don't get this error in zend framework because the error display might have been turned off, so have a look at your application.ini file for setting.
The best way to do this would be to store image in folders and store the filename or filepath in database and echo out something like
<td style="width: 20%;">
<img src="<?php echo $imagefullpath; ?>"/>
</td>
But if you still want to store image in database then, you can use ajax to load image. For further assistance, please comment.

Answer 3

For the beginners there is a very handy rule:
PHP can't do anything beside plain HTML can.
Now answer yourself a question:
would you see anything if you paste image file contents directly into HTML code?
And then another one
How do images being displayed in HTML?
And a final one:
are you sure you want to store images in the blob field in database?