src/Service/validateService.php
public function lessThan($value, $max)
    {
        $this->errorMessage = null;
        require_once 'Zend/Validate/LessThan.php';
        $validator = new \Zend_Validate_LessThan($max);
        $result = $validator->isValid($value);
        if (!$result) {
            $this->errorMessage = MessageHelper::getMessage("VALIDATESVC_LESS_THAN", array($this->fieldNameMask, $max));
        }
        return $result;
    }
public function lessThan($value, $max)
    {
        $this->errorMessage = null;
        require_once 'Zend/Validate/LessThan.php';
        $validator = new \Zend_Validate_LessThan($max);
        $result = $validator->isValid($value);
        if (!$result) {
            $this->errorMessage = MessageHelper::getMessage("VALIDATESVC_LESS_THAN", array($this->fieldNameMask, $max));
        }
        return $result;
    }
Built-in \Zend less than check.  Returns true if and only if $value is less than the minimum boundary.

@param integer $value
@param integer $max
@return boolean Valid?