PHP/Language Basics/Pre Defined Constant

__FILE__: The name of the script file being parsed

   <source lang="html4strict">

<? echo "
This file is ".__FILE__; ?>

      </source>
   
  

__LINE__: The number of the line in the script being parsed

   <source lang="html4strict">

<? echo "
This is line number ".__LINE__; ?>

      </source>