Why do some web pages look like this?

It looks fine if I go directly to the site.
Which browser are you using?

 

In the screenshot you posted the text displayed atop the web page are error messages output by the apache web server. Likely a typo in php code that was corrected cause the site loads fine in my browser at present. It's not really an error message from the apache server though. It's page header info, and likely the typo in the php code is in a section at beginning that utilizes the php function header(foo);