Defun: dph_expandString( string $str )@{...} String;
Expands all environment variables contained in a string. The
variables must be UNIX format(i.e., $var or ${var}).
Input: the string to expand
Return: the expanded string
Defun: dph_preparePath( string $path )@{...} String;
Prepares a file path for cross-platform use. It first expands all environment
variables in the path and then converts all path separators to
appropriate separator for the platform.
Input: file path to prepare
Return: prepared file path
Defun: dph_displayURL( string $url )@{...} Boolean;
Displays a URL or file in a browser.
Input: HTTP based URL or a file path.
Return: TRUE if successfully started browser.