regular expression help!

Hello, Can someone here give me a glue how to do the following. I guess I need to use regular expressions here. I have absolutely zero experience with regular expressions. (if there's another way to do this I don't mind. I jus need to get this done somehow :) I need to strip all characters from the following text string exept the image path... "<img width=\"99\" height=\"120\" border=\"0\" src=\"../../images/new/thumps/4123141112007590373240.jpg\" />"...and then store the path to DB. Image path lengh can vary so I guess that I need to extract all characters after scr=\" until next \" or somethig similar. Thanks for your advise! -Will