Upload images and file extension missing on mysql field - php

Question

I have this piece of code that executes a multi image upload and renaming it.
it works, The file is renamed correctly, but I do not understand why in the mysql database I do not have the file extension but only the name.
Example:
file name (folder): abcdefg.jpg
pd_image (mysql field): abcdefg
$resultname is the same for both
$mainame = $handle->file_dst_name;
$db_name = str_replace(" ","_",$mainame);
$image = md5(rand() * time()) . ".$db_name";
$parts = explode(".",$image);
$extension = end($parts);
$resultname = str_replace("." . $extension,"",$image);
$handle->file_new_name_body = $resultname;
$handle->image_resize = true;
$handle->image_ratio_crop = true;
$handle->image_x = 800;
$handle->image_y = 600;
$handle->Process($dir_dest);
// we check if everything went OK
if ($handle->processed) {
header("Location: index.php"); //echo 'image resized';
$handle->clean();
$query_img="INSERT into tbl_images (pd_id, file_name, pd_image) VALUES('$pd_id','$mainame','$resultname')";
$result2 = dbQuery($query_img);
I am using the class "class.upload.php"

Answer 1

Check this line, You are replacing the extension with the "".
$resultname = str_replace("." . $extension,"",$image);
Replace this line to
$resultname = $image.'.'.$extension;
your are giving variable $db_name as string.Correct way to concatenate the variable to another string is
$image = md5(rand() * time()).$db_name;