There is an easy way out in order to solve this problem. After several puzzling encounters why this warning occurs to some files, at last a solution has been carved out.

From my experience, the cause of this are the whitespaces before or after the <?php ... ?> tags. That is, if you use the header() function, make sure that the file or any files (required or included) associated with it has no whitespaces to begin with.

Let me share two articles that has a good explainations on this case:

If you are planning to study abroad especially to Australia, this article is for you. This is just a content repost of the same title from this link.

Applications for each university

Adelaide

If you are using Windows XP, here's your solution in transferring your message archives from one user account (say user1) to another (user2):

• ADB - Japan Scholarship Program
• ASEAN University Network
• ASEAN Foundation

The following open source social networking softwares are freely downloadble:

1. spree - an expert search engine where users ask questions to find other participating users, who are knowledgeable in that area and willing to help.

2. iSocial - a free social networking CMS software that allows you to create your own Friendster and Orkut like sites. Use bookmarks,
   dating and create groups with just one mouse click.

Here is a list of websites I like for the reason of their simplicity, good makeup and usability:

Here's an article from oedb of the same title:

These Web 2.0 tools were designed specifically for students, educators, and/or parents.

1. Flash. Learn to use Macromedia Flash in this course that will culminate with your having created one fully-functional Flash project.
2. Weekly Web Design Class. Go beyond simply learning HTML to develop a deeper understanding of what makes a great website with this class.
3. Learn and Apply HTML.