php5 regex

[s0me0ne]

I've been trying to do a regex to get an image out of a html string

preg_replace('/^img src="([^"]*)/e', '\1', $html_string())

However that isnt working. I basically need to get the first image in the string

[Weedpacket]

You don't want the beginning-of-string anchor (the first "^") and you don't want the execute-as-code modifier (the "e").