character length

[verN]

hi, i wanted to know how to check that the user hasn't inputted a vlaue more then for instance 15 charactrs.

I have a form which takes the name, and other contact details. But I would like to preverent the user from entering 30 characters rather then less then 20 is there a way to do this.
Thanks

<input type=text name=name size=20 />

i was thinking one could use javascript where the input tag can take onchange or can php do this

[Piranha]

No matter if you use javascript you should always check in PHP as well since JS can be turned off and otherwise tampered with. In HTML you can use maxlength="20" as well, but it is still possible to bypass, why you have to check in PHP to make sure.

Here is a list of string commands with an easy explanation to each one, look through it to find what you need and get to know what you can do with strings.

[Flyier]

<?php

 $str = 'abcdef';

  if (strlen($str)>20) 
   {
     // some code ...
   }

?>