Unable to show Images stored in mySQL using PHP - php

Question

I am trying to store images in mySQL database and then displaying on the other page. I have this function to store images in mySQL.
function upload() {
include "databaseConnection.php";
$maxsize = 10000000; //set to approx 10 MB
//check associated error code
if ($_FILES['userfile']['error'] == UPLOAD_ERR_OK) {
//check whether file is uploaded with HTTP POST
if (is_uploaded_file($_FILES['userfile']['tmp_name'])) {
//checks size of uploaded image on server side
if ($_FILES['userfile']['size'] < $maxsize) {
// prepare the image for insertion
$imgData = addslashes(file_get_contents($_FILES['userfile']['tmp_name']));
// put the image in the db...
// database connection
mysql_connect($host, $user, $pass) OR DIE(mysql_error());
// select the db
mysql_select_db($db) OR DIE("Unable to select db" . mysql_error());
// our sql query
$sql = "INSERT INTO carsinfo
(carName, carPicture)
VALUES
('{$_FILES['userfile']['name']}', '{$imgData}');";
// insert the image
mysql_query($sql) or die("Error in Query: " . mysql_error());
$msg = '<p>Image successfully saved in database with id =' . mysql_insert_id() . ' </p>';
} else {
// if the file is not less than the maximum allowed, print an error
$msg = '<div>File exceeds the Maximum File limit</div>
<div>Maximum File limit is ' . $maxsize . ' bytes</div>
<div>File ' . $_FILES['userfile']['name'] . ' is ' . $_FILES['userfile']['size'] .
' bytes</div><hr />';
}
}
else
$msg = "File not uploaded successfully.";
}
else {
$msg = file_upload_error_message($_FILES['userfile']['error']);
}
return $msg;
}
And this code to show iamges.
<?php
include "databaseConnection.php";
// just so we know it is broken
error_reporting(E_ALL);
// some basic sanity checks
//connect to the db
$link = mysql_connect("$host", "$user", "$pass") or die("Could not connect: " . mysql_error());
// select our database
mysql_select_db("$db") or die(mysql_error());
// get the image from the db
$sql = "SELECT carPicture FROM carsinfo;";
// the result of the query
$result = mysql_query("$sql") or die("Invalid query: " . mysql_error());
$row = mysql_fetch_assoc($result);
// set the header for the image
echo $row['carPicture'];
header("Content-type: image/jpeg");
// close the db link
mysql_close($link);
?>
When this code is run, nothing is shown on the page, even if I write some HTML inside this code, empty page is shown.

Answer 1

I assume you are saving the image content as blob and if your sql is returning the correct data then you can display as
header("Content-type: image/jpeg");
echo $row['carPicture'];
You need to add the header first before the image.
or
echo '<img src="data:image/jpeg;base64,' . base64_encode($row['carPicture']) . '">';

Answer 2

do not write
include databaseConnection.php
nothing include anything.