Form character count error

[monkeybidz]

My form currently checks for Zip Code empty field or checks that the Zip Code input matches the data base info. How would i get this form to return an error if the field text is less than 5 characters or digits?

 

Next error message will be:

 

$arrErrors = '3';

 

Current form checker is:

 

if ($_POST['zip2']==''|| $zip2 === 'false'.$z)

       $arrErrors = '02';

       header("Location: quote_error.php?");

 

 

[corbin]

if(strlen($_POST['zip2']) != 5) {

//incorrect zip code length.

}