function name($param, $line = __LINE__, $file = __FILE__) {};

Question

Is it possible to have a function automatically contain the line number and the file that the function was CALLED in,

as if i call __LINE__ or __F

Answer 1

if you want to use this information in some kind of error message, there is a function trigger_error() which will raise PHP native error, so, therefore, it will be shown in usual PHP manner - with filename, line number and supplied text.

Most neat feature of this function is behaving according to current error handling settings:

ini_set('display_errors',1);
trigger_error("Horrible bug found!");

will print out directly to screen an error message like this:

Notice: Horrible bug found! in /path/file.php on line 2

very handy for developing
while this code

ini_set('display_errors',0);
ini_set('log_errors',1);
trigger_error("Horrible bug found!");

will be put into error log for the future reference
obligatory for the production