- substr: documentation ( source)
- str_replace: documentation ( source)
- strrpos: documentation ( source)
- realpath: documentation ( source)
<?php
echo "FILE: '".__FILE__."'\n";
print "Result: '".realpath(substr(__FILE__, 0, strrpos(str_replace('\\', '/', __FILE__), '/')).'/../../inc/').'/';
echo "'\nDONE";
?>