Image Path isn't displaying image - php

Question

Am wondering why these image isn't showing even after properly retrieving the image path from MYSQL i've gone through the code and i still can't figure out why this is:
<?php
$sql = "SELECT description, quantity, product_price, category, product_img_url";
$sql .= " FROM *****, *****";
$sql .= " WHERE product_id = product_img_id";
$sql .= " AND product_id = ?";
$sql .= " LIMIT 1";
$stmt = $mysqli->prepare($sql);
$stmt->bind_param('s', $id);
$stmt->execute();
$stmt->store_result();
if($stmt->num_rows==1){
$stmt->bind_result($desc,$qty,$pr,$cat,$product_img_url);
$stmt->fetch();
?>
<div id="infobox">
<h3>Product View</h3>
<p align="left">
<?php
if(file_exists($product_img_url)){
echo '<img src="'.$product_img_url.'" alt="" width="300" height="300" />';
}else{
echo '<img src="" alt="product image" />';
}
?>
Please can someone tell me why this is happening?

Answer 1

If the image file does exist, then this might have something to do with the path.
I would use firebug to play with the image src path and try various things like putting a slash in the beginning, or removing it, or entering absolute path of image.
Once I get the image to show up in firebug, I would then proceed to fix the issue in the code.

Answer 2

As i am see you code and i just want to ask you that you have store complete path of your image in db or you have store just some part of it.
as i can see you have retrieve image path from mysql but the browser not able to retrieve image from your server path it may be because of path you r providing and and where the file store not match. the best way to check your file path and mysql path use
var_dump(your result set) and check you output weather image url match with your server image path, and i am prety much sure that your path will not match.

Answer 3

Can you please try with the following path structure
echo '<img src="/application_root_directory/'.$product_img_url.'" alt="" width="300" height="300" />';

Answer 4

Well, You can do like:
$product_img_url="guarantee.png"; ?>
<img src="images\<?php echo $product_img_url; ?>" alt="Hello">

Answer 5

It will not installed by default you have to install it manually. Either you can do goto tools in menubar>add-ons, and search in search fox for firebug or goto firebug website to install it.

Answer 6

Thanks everyone for all useful ideas presented, I appreciate. I've found a way to resolve the relative/absolute links. The images are now being displayed as they should! What I did was; since I have sub directories under my root folder, I created separate 'Meta' php scripts in each sub directory with names like INC, __ADM, etc. Each script links to another script in a toplevel directory. All I placed within the scripts were just paths, that I got using DOCUMENT_ROOT, doing this I was able to get the actual path to the image folder, that I then placed in the DB. Hope this idea helps someone else!