> -----Original Message----- > From: Frank Stanovcak [mailto:blindspotpro@xxxxxxxxxxx] > Sent: Thursday, September 25, 2008 12:41 PM > To: php-general@xxxxxxxxxxxxx > Subject: Filters and sanitizing a regexp > > Is it possible to use the php filter function to sanitize a regular > expression such as to return just the date part of a string that may be > passed by an nonobservant user? > > "#\d\d/\d\d/\d\d\d\d#" > > input would be something like > as02/05/2008df > > I want to use the filter to give me just the date should some oaf not > leave > the date field as just digits. Using preg_match and numbered groups, you could re-build the variable like this: <?php $var = "as02/05/2008df"; $matches = array(); preg_match("#(\d{2})\D*(\d{2})\D*(\d{4})#", $var, $matches); if(count($matches) != 4) { echo "Invalid data<br />"; } else { $filtered = $matches[1] . $matches[2] . $matches[3]; echo $filtered; } ?> HTH, Todd Boyd Web Programmer -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
