cron.php not running properly?

I'm not the big expert on running crons, but when I run the cron at my website by putting the domain url into the browser:

http://www.domain.com/cron.php

It doesn't seem to actually work. So I logged directly into the server (it's my server) as root and tried to run it in a terminal. Whether I ran it as root or changed permissions or whatever it returned these results (this is from running it in a terminal):

/var/www/web6/web/cron.php: line 1: ?php: No such file or directory
/var/www/web6/web/cron.php: line 2: //: is a directory
/var/www/web6/web/cron.php: line 4: /bin: is a directory
/var/www/web6/web/cron.php: line 5: bin: command not found
/var/www/web6/web/cron.php: line 6: syntax error near unexpected token `('
/var/www/web6/web/cron.php: line 6: ` * Handles incoming requests to fire off regularly-scheduled tasks (cron jobs).'

It doesn't appear to be doing anything or finding stuff that it's expecting. What am I doing wrong?

Here's what the body of the cron.php looks like (if the site let's me post it):

// $Id: cron.php,v 1.28 2005-01-09 09:22:38 dries Exp $

/**
* @file
* Handles incoming requests to fire off regularly-scheduled tasks (cron jobs).
*/

include_once 'includes/bootstrap.inc';
include_once 'includes/common.inc' ;

// If not in 'safe mode', increase the maximum execution time:
if (!ini_get('safe_mode')) {
set_time_limit(240);
}

// Check if the last cron run completed
if (variable_get('cron_busy', false)) {
watchdog('cron', t('Last cron run did not complete.'), WATCHDOG_WARNING);
}
else {
variable_set('cron_busy', true);
}

// Iterate through the modules calling their cron handlers (if any):
module_invoke_all('cron');

// Clean up
variable_set('cron_busy', false);
watchdog('cron', t('Cron run completed'));