I'm moving the Featured Image Metabox in WordPress from the Side over to the Normal position. It now takes up a much wider portion of the screen than by default. The image that is placed in that metabox though is fixed at a certain height and width. I'm trying to remove that hardcoded height and width. I've got a string: 

```
<img src="http://www.IMAGEFOLDERURL/imageone-300x225.jpg">

```

I need to remove the -300x225. However, the 225 is different for every image. So I need to remove "-300x\*\*\*". \* = anything. Is that possible with PHP?

EDIT: I'm not sure I'm being clear. The IMAGEFOLDERURL is filler, because the website could be anything. Also, I forgot to mention that the image url is part of a larger string. So after the:

```
<img src="http://www.IMAGEFOLDERURL/imageone-300x225.jpg">

```

There will be more. The entire string will be something like:

```
Variable length content here<img src="http://www.IMAGEFOLDERURL/imageone-300x225.jpg">Variable length content  after.

```