Have been working on some PHP code and trying to implement the below code on a forum, and has generally worked okay when a poster is just posting their post only, BUT, when they're also quoting another users post within theirs, without apparently going against any of the coding below, it gives the error message as if someone has posted one of the below? Is it the [quote] code that appears when quoting someone elses post ?

PHP Code:
          if (preg_match('/(http|www|.com|.es|.co.uk|.info|.org)/i'request_var('message'''true)))