Question

A client has just asked me to fix an issue with their webside. I did not build it but here is what’s happening.

The images are stored in the db as longblobs. Before moving to a new server, everything was working a ok. On the new server, some images only display partially. Even though the image is displayed at desired width and height, over a half of the image is either white or gray. EDIT: Only images uploaded after the server change are affected!

This is used for reading the image into a string for db insertion:

move_uploaded_file($_FILES['imagefile1']['tmp_name'],'tmppic.img'))  $tmpstr = fopen('tmppic.img','rb'); $image = addslashes(fread($tmpstr,filesize('tmppic.img'))); 

Here are the PHP functions used for displaying the images: imagecreatefromstring, imagecreatetruecolor, imagecopyresampled, imagejpeg

Since this has started happening after the server move, I am suspecting server configuration.

What is going on?

Answer 1

Ok, figured it out. Looking at the code below.

if (move_uploaded_file($_FILES['imagefile1']['tmp_name'],'tmppic.img')){ $tmpstr = fopen('tmppic.img','rb'); $image = addslashes(fread($tmpstr,filesize('tmppic.img'))); 

The uploaded file is moved into the tmppic.img file. That file is constantly used. The problem is that filesize(‘tmppic.img’) is returning the size of the file before move_uploaded_file. So, if the previous tmppic.img had a 120k filesize and the new uploaded file is larger, only 120K worth of info is read, thus the gray area in the pictures.

I fixed the issue by replacing filesize(‘tmppic.img’) with

$file_size = $_FILES['imagefile1']['size']; $image = mysql_real_escape_string(fread($tmpstr,$file_size)); 

Is this a bug?