无法将Blob存储的图像转换为图像格式（MySql和php）？

Question

I am trying to get the image which is stored in the blob format in Mysql Database.I am using the following code.
index.php

<img src='image.php?questionid=questionid&question=question1&answer=answer1&author=myname' />

image.php

<?php
require_once('dbconfiguration.php');
$sql="SELECT image FROM tablename WHERE questionid='{$_GET['questionid']}' and question='{$_GET['question']}' and answer='{$_GET['answer']}' and author='{$_GET['author']}'";
$STH = $DBH->query($sql);  
$STH->setFetchMode(PDO::FETCH_ASSOC);  
$row = $STH->fetch();  
ob_clean();
header("content-type: image/jpg") ; 
echo $row['image'] ; 
?>

In index.php I didn't get any image.So When I enter the URL for image.php I am getting the following error in forefox.

The image “URL” cannot be displayed because it contains errors.

I am using php5.3 and mysql 5.1.36 .

What I did wrong.I went through almost all forums and no clues.Please help me on this.

Answer 1

It should be:

<?php
require_once('dbconfiguration.php');
$sql="SELECT image FROM tablename WHERE questionid='{$_GET['questionid']}' and question='{$_GET['question']}' and answer='{$_GET['answer']}' and author='{$_GET['author']}'";
$STH = $DBH->query($sql);  
$STH->setFetchMode(PDO::FETCH_ASSOC);  
$row = $STH->fetch();  
ob_clean();
header("content-type: image/jpg") ; 
echo $row['image'] ; 
?>

As your database field is called image not Efaq_image