Source/SimpleIpn.php
protected function ipnPostDataCheck()
    {
        if (count($this->postData) < 1 || !array_key_exists('REFNOEXT', $this->postData)) {
            $this->debugMessage[] = 'IPN POST: MISSING CONTENT';
            $this->errorMessage[] = 'IPN POST: MISSING CONTENT';
            return false;
        }
        return true;
    }
protected function ipnPostDataCheck()
    {
        if (count($this->postData) < 1 || !array_key_exists('REFNOEXT', $this->postData)) {
            $this->debugMessage[] = 'IPN POST: MISSING CONTENT';
            $this->errorMessage[] = 'IPN POST: MISSING CONTENT';
            return false;
        }
        return true;
    }
protected function ipnPostDataCheck ( ) { if ( count ( $ this -> postData ) < 1 || ! array_key_exists ( 'REFNOEXT' , $ this -> postData ) ) { $ this -> debugMessage [ ] = 'IPN POST: MISSING CONTENT' ; $ this -> errorMessage [ ] = 'IPN POST: MISSING CONTENT' ; return false ; } return true ; }
Check post data if contains REFNOEXT variable

@return boolean
Check post data if contains REFNOEXT variable