Get thumbnail image from the original image path - php

Question

I store the original image path(included file name) in db when upload an image.
For example:
img/uploaded/photo.jpg
Then I generate its thumbnail and store in below directory NOT in db.
/img/uploaded/thumbs/photo_thumb.jpg
And I have following function but no idea how to get the thumb which belong to the url in db.
//ie: $file is img/uploaded/photo.jpg
public function get_thumb($file)
{
//get the path without filename
$get_path = dirname($file) . "/thumbs/";
//result img/uploaded/thumbs/ (how can i get the photo_thumb.jpg) here?
return $get_path;
}
Edit
basename($file) to get filename from path but how to add _thumb.jpg?

Answer 1

Don't have much experience with PHP but using this as starting point, I get:
$pattern = '/^.*\/(.*)$/'; // match everything after the last slash and store it in $1
$replacement = '$1';
$filename = preg_replace($pattern, $replacement, $file);
$get_path = $file . '/thumbs/' . $filename;
As I said, not much experience with PHP, but this should do it...
A more easy way to do this, could be:
Find the last / in $file
Insert thumbs/ after it or replace it with /thumbs/
Find the last . in the edited $file
Insert _thumb after it
You can find the postitions of / and . with the strrchr function (documented here).

Answer 2

You can do this :
public function get_thumb($file) {
$infos = pathinfo($file);
$path = $infos['dirname'] . '/thumbs/' . $infos['filename'] . '_thumb.' . $infos['extension'];
return $path;
}

Answer 3

Usually, the way I do this is, is to store just the filename in the db. (assuming that they are all in the same directory).
Then query the database and get the filename, store it in:
$filename;
Then I just echo out something like
echo base_url('images/thumbs/' . $filename);
Hope this helps!