How to get the URL of the currently executing PHP script?

Question

How do I get the URL of the currently executing PHP script?

For example, the URL http://www.domain.com/folder/script.php sends a request to /var/www/domain/folder/script.php.

In script.php, I want to echo http://www.domain.com/folder/ (not /var/www/domain/folder/, not http://www.domain.com/folder/script.php). What is the simplest way to do this?

Answer 1

A simple Google search would have answered your question. Here's the result.

http://php.about.com/od/learnphp/qt/_SERVER_PHP.htm