I have a main Php page with 75% constant contents. I want to change the other 25% depending on what page calls the main page.
Example
www.example.com/a.html
www.example.com/b.html
www.example.com/c.html
The above pages use an html redirect code
www.example/x/y/z/mainpage.php
Pages a, b, and c are redirect pages to mainpage.php
How can I how can I open storya.txt when...