string manipulation

Hello everyone, this is my first post, so please bare with me. I am very new to php and i am currently working on modifying existing php e-commerce site. so my question is as follow and its more of a general question but it involves a db so i thought i would ask here i have a mysql db, in one of the fields, there is a description of an item, along with a url all in one field. what i need to do is to extract the url string from the description field. is there some sort of parsing call i can evoke to extract the url? Beginning with the http and ending with the first white space? Martin _________________________________________________________________ STOP MORE SPAM with the new MSN 8 and get 2 months FREE* http://join.msn.com/?page=features/junkmail