Setting maximum length to description text area

[dc_jt]

I have a validation function like this:

[code]private function ValidateData($aPostData)
{
//If normal listing
if ($aPostData['iTypeId'] == 1){
//check all fields
if (trim($aPostData['name']) == "") return false;
if (trim($aPostData['address']) == "") return false;
if (trim($aPostData['postcode']) == "") return false;
if (trim($aPostData['telephone_number']) == "") return false;
if (trim($aPostData['fax']) == "") return false;
if (trim($aPostData['email']) == "") return false;
if (trim($aPostData['description']) == "") return false;
return true;
//All larger Ads
}else{

if (trim($aPostData['name']) == "") return false;
return true;
}
}//end function[/code]

I want to add something so that the user cant enter more than 120 characters in the description box.

How could I add this?

Thanks

[alpine]

strlen()

[code]

<?php

if (strlen(trim($aPostData['description'])) > 120) return false;

?>

[/code]