php - tag inside reqular expression -

php - <br> tag inside reqular expression -

i have regular expression

$rexp = '/^[0-9a-za-z\s"]{1,22}$/';

and check

if(preg_match($rexp, $userstring)) {echo 'ok';}

my problem $userstring can this:

$userstring = 'hello<br>hello';

i modify regular look so:

$rexp = '/^[0-9a-za-z\s<>"]{1,22}$/';

but dont because accepts script , other tags

how can alter regular look accepts br tag?

thank you

im assuming sort of input validation.

the proposed reply @onlinecop work think messing "length" of string, since <br> tag count 4 chars.

will work? yes, sure. it's expected outcome? im not sure.

if thats works you, excellent! think fastest method, very little overhead can this:

$maxlength = 22; // proposed @onlinecop without char count $regex = '^(?=(?:[0-9a-za-z\s"]|<br>)+$).+$' /* * first: has valid length? * second: has valid characters/tags? */ if (count(strip_tags($userstring)) <= $maxlength) && preg_match($regex, $userstring)) { echo 'ok'; }

php regex