[RESOLVED] Input Validation Help

transfield

Hello,
I have a html form with a 4 text boxes & a Submit button. I want to prevent the user from keying in the percentage character % into any of the text boxes in the following variations:-

Disallowed Variations:-
%
%%
%%%
%%%%
%%%%% up to 15 characters
mer%edes
%ampro
perdan%
%oyot%
ele%ha%t

I'm using the current code & I trust that you can help me to edit my code. Thank you very much.

for ($i=1; $i<5; $i++) {
    if (preg_match('/^([I dont know how to write this part]){1,15}+$/', ($_POST['Text_Box_'.$i]))){
    die("This keyword is disallowed. Please change your search criteria to something else. Thanks :-)");
    }
}

bradgrafelman

So.. let me get this straight... you don't want to allow the % character to be used at all, UNLESS it is used 16 or more times in a row?

transfield

bradgrafelman wrote:
So.. let me get this straight... you don't want to allow the % character to be used at all, UNLESS it is used 16 or more times in a row?

Yes, you are right & thanks for replying.

laserlight

I think [man]substr_count/man can be used here.

transfield

laserlight wrote:
I think [man]substr_count/man can be used here.

Thanks laserlight. Yes, substr_count() solved my problem. I appreciate your help.