Re: [PHP] string filtering
John W. Holmes wrote:
To detect them:
if(preg_match('/[^0-9a-zA-Z]/',$string))
{ echo 'bad characters present'; }
else
{ echo 'string okay'; }
or (faster):
if (!ctype_alnum($string)){
echo 'bad characters present';
} else {
echo 'string okay';
}
Aaron
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] string filtering
Hello all, I need to filter some strings. They can only contain characters like a...z or A..Z and 0..9. Some strings have blank spaces, -,./?, characters that must be discarded. I wrote a function to check each and every character but I guess there must be something else more efficient. Any suggestions? Thanks in advance. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] string filtering
C.F. Scheidecker Antunes wrote:
I need to filter some strings. They can only contain characters like
a...z or A..Z and 0..9. Some strings have blank spaces, -,./?,
characters that must be discarded. I wrote a function to check each and
every character but I guess there must be something else more efficient.
Any suggestions?
To get rid of them:
$newstring = preg_replace('/[^0-9a-zA-Z]/','',$oldstring);
To detect them:
if(preg_match('/[^0-9a-zA-Z]/',$string))
{ echo 'bad characters present'; }
else
{ echo 'string okay'; }
--
---John Holmes...
Amazon Wishlist: www.amazon.com/o/registry/3BEXC84AB3A5E/
php|architect: The Magazine for PHP Professionals www.phparch.com
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
