php - original variable name passed to function?

You can not get the variable name, but if you want it for
debugging, then you can use PHP's built-in href="http://php.net/manual/en/function.debug-backtrace.php"
rel="nofollow">debug_backtrace(), and I recommend
to take a look on Xdebug
as well.

With this function, you can get some
data on the caller, including the file and line number, so you can look up that line
manualy after running the
script:

function
            debug_caller_data()
{
 $backtrace =
            debug_backtrace();


 if (count($backtrace) >
            2)
 return $backtrace[count($backtrace)-2];
 elseif
            (count($backtrace) > 1)
 return $backtrace[count($backtrace)-1];

            else
 return
            false;
}

Full
example:

function
            debug_caller_data()
{
 $backtrace =
            debug_backtrace();

 if (count($backtrace) > 2)
 return
            $backtrace[count($backtrace)-2];
 elseif (count($backtrace) >
            1)

 return $backtrace[count($backtrace)-1];

            else
 return false;
}

function
            write($var)
{

            var_dump(debug_caller_data());
}



function
            caller_function()
{
 $abc = '123';

            write($abc);
}

$abc =
            '123';
write($abc);


caller_function();