Question: So, it's common practice, these days, to concatenate & minify our web app assets like `css` & `javascript`. Almost every technology stack, offers tools to do so.

What I'm wondering, is if there's a way to concatenate all my image resources. That would, I'm sure, load my image heavy site much faster.

I am aware of how this can be manually achieved (think stitching images in PS). I am also aware of algorithms that can automatically do that.

My questions are:

1. Has this become standard practice yet?
2. Are there tools already doing this?
3. Would it really help speed up the loading of the website (by the same logic, I think, it definitely should.

Answer: 
Change 

```
if (isset($_POST[‘optone’])) {
    // ...
}

```

to

```
if ($_POST['selectbox'] == 'optone')) {
    // ...
}

```

and do the same for `opttwo`.

Note that strings in PHP are quoted with `'` or `"`, not with `‘`.
```
if ($_POST['selectbox']  === 'optone')

```

optone and opttwo are values