c5

If you have a file input field on a C5 form and you want it to send those files in the notify email

First open concrete/helpers/mail.php it should look like this

defined('C5_EXECUTE') or die("Access Denied.");
class MailHelper extends Concrete5_Helper_Mail {
}

Make it look like this

defined('C5_EXECUTE') or die("Access Denied.");
class MailHelper extends Concrete5_Helper_Mail {
    protected $files = array();
    
    /**
     * Add an attachement to the email by the file id
     * @param int $fileId
     */
    public function AddAttachmentById($fileId) {
        Loader::model('file');
        $this->files[] = File::getByID($fileId);
    }
    
    /**
     * Add an attachment to the email
     * @param File $file
     */
    public function addAttachment($file) {
        $this->files[] = $file;
    }
    
    /** 
    * Sends the email
    * @return void
    */
    public function sendMail($resetData = true) {
        $_from[] = $this->from;
        $fromStr = $this->generateEmailStrings($_from);
        $toStr = $this->generateEmailStrings($this->to);
        $replyStr = $this->generateEmailStrings($this->replyto);
        if (ENABLE_EMAILS) {

            $zendMailData = self::getMailerObject();
            $mail=$zendMailData['mail'];
            $transport=(isset($zendMailData['transport']))?$zendMailData['transport']:NULL;

            if (is_array($this->from) && count($this->from)) {
                if ($this->from[0] != '') {
                    $from = $this->from;
                }
            }
            if (!isset($from)) {
                $from = array(EMAIL_DEFAULT_FROM_ADDRESS, EMAIL_DEFAULT_FROM_NAME);
                $fromStr = EMAIL_DEFAULT_FROM_ADDRESS;
            }

            // The currently included Zend library has a bug in setReplyTo that
            // adds the Reply-To address as a recipient of the email. We must
            // set the Reply-To before any header with addresses and then clear
            // all recipients so that a copy is not sent to the Reply-To address.
            if(is_array($this->replyto)) {
                foreach ($this->replyto as $reply) {
                    $mail->setReplyTo($reply[0], $reply[1]);
                }
            }
            $mail->clearRecipients();


            $mail->setFrom($from[0], $from[1]);
            $mail->setSubject($this->subject);
            foreach($this->to as $to) {
                $mail->addTo($to[0], $to[1]);
            }

            if(is_array($this->cc) && count($this->cc)) {
                foreach($this->cc as $cc) {
                    $mail->addCc($cc[0], $cc[1]);
                }
            }

            if(is_array($this->bcc) && count($this->bcc)) {
                foreach($this->bcc as $bcc) {
                    $mail->addBcc($bcc[0], $bcc[1]);
                }
            }

            $mail->setBodyText($this->body);
            if ($this->bodyHTML != false) {
                $mail->setBodyHTML($this->bodyHTML);
            }
            
            if (!empty($this->files)) {
                Loader::library('3rdparty/Zend/Mime/Part');
                Loader::library('3rdparty/Zend/Mime');
                foreach ($this->files as $file) {
                    $part = new Zend_Mime_Part(file_get_contents($file->getPath()));
                    $part->filename = basename($file->getPath());
                    $part->disposition = Zend_Mime::DISPOSITION_ATTACHMENT;
                    $part->encoding = Zend_Mime::ENCODING_BASE64;
                    $mail->addAttachment($part);
                }
            }
            
            try {
                $mail->send($transport);

            } catch(Exception $e) {
                $l = new Log(LOG_TYPE_EXCEPTIONS, true, true);
                $l->write(t('Mail Exception Occurred. Unable to send mail: ') . $e->getMessage());
                $l->write($e->getTraceAsString());
                if (ENABLE_LOG_EMAILS) {
                    $l->write(t('Template Used') . ': ' . $this->template);
                    $l->write(t('To') . ': ' . $toStr);
                    $l->write(t('From') . ': ' . $fromStr);
                    if (isset($this->replyto)) {
                        $l->write(t('Reply-To') . ': ' . $replyStr);
                    }
                    $l->write(t('Subject') . ': ' . $this->subject);
                    $l->write(t('Body') . ': ' . $this->body);
                }				
                $l->close();
            }
        }

        // add email to log
        if (ENABLE_LOG_EMAILS) {
            $l = new Log(LOG_TYPE_EMAILS, true, true);
            if (ENABLE_EMAILS) {
                $l->write('**' . t('EMAILS ARE ENABLED. THIS EMAIL WAS SENT TO mail()') . '**');
            } else {
                $l->write('**' . t('EMAILS ARE DISABLED. THIS EMAIL WAS LOGGED BUT NOT SENT') . '**');
            }
            $l->write(t('Template Used') . ': ' . $this->template);
            $l->write(t('To') . ': ' . $toStr);
            $l->write(t('From') . ': ' . $fromStr);
            if (isset($this->replyto)) {
                $l->write(t('Reply-To') . ': ' . $replyStr);
            }
            $l->write(t('Subject') . ': ' . $this->subject);
            $l->write(t('Body') . ': ' . $this->body);
            $l->close();
        }		

        // clear data if applicable
        if ($resetData) {
            $this->to = array();
            $this->cc = array();
            $this->bcc = array();
            $this->replyto = array();
            $this->from = array();
            $this->template = '';
            $this->subject = '';
            $this->body = '';
            $this->bodyHTML = '';
        }
    }
}

Then Find /concrete/core/controllers/blocks/form.php. In the function action_submit_form() there is a spot that looks like

$mh = Loader::helper('mail');
$mh->to( $this->recipientEmail ); 
$mh->from( $formFormEmailAddress );
$mh->replyto( $replyToEmailAddress ); 
$mh->addParameter('formName', $this->surveyName);
$mh->addParameter('questionSetId', $this->questionSetId);
$mh->addParameter('questionAnswerPairs', $questionAnswerPairs); 
$mh->load('block_form_submission');
$mh->setSubject(t('%s Form Submission', $this->surveyName));
//echo $mh->body.'<br>';
@$mh->sendMail(); 

change that to

$mh = Loader::helper('mail');
$mh->to( $this->recipientEmail ); 
$mh->from( $formFormEmailAddress );
$mh->replyto( $replyToEmailAddress ); 
$mh->addParameter('formName', $this->surveyName);
$mh->addParameter('questionSetId', $this->questionSetId);
$mh->addParameter('questionAnswerPairs', $questionAnswerPairs); 
$mh->load('block_form_submission');
$mh->setSubject(t('%s Form Submission', $this->surveyName));
if (!empty($tmpFileIds)) {
    foreach ($tmpFileIds as $tmpFileId) {
        $mh->AddAttachmentById($tmpFileId);
    }
}
                                
//echo $mh->body.'<br>';
@$mh->sendMail(); 

Thats it!