swiftmailer and email form with attachment - beginner - php

Question

As always here is the place where I have learned a lot. And I have now a new things to learn:
I have a html form:
<tr><td width="16%">File attachment</td><td width="2%">:</td><td><input type="file" name="fileatt" /></td></tr>
and a mail.php:
$attachfile=$_POST["fileatt"];
and a correct swiftmailer code to send emails out;
I have googled and I found many examples how to send attachment with a file stored on the website but I would like to do it on the fly. So when you submit the button it would send it to peoples out rather than uploading the file.
// Create the Transport
$transport = Swift_SmtpTransport::newInstance('mail.server.co.uk', 25)
->setUsername('user')
->setPassword('pass')
;
// Create the Mailer using your created Transport
$mailer = Swift_Mailer::newInstance($transport);
// Create a message
$message = Swift_Message::newInstance($subject)
->setFrom(array('emai#emai.com' => 'name'))
->setBody($html, 'text/html')
;
// Add alternative parts with addPart()
$message->addPart(strip_tags($html), 'text/plain');
// Send the message
$result = $mailer->send($message);
could anyone help me how to do the on the fly file uploading, please? Thanks in advance!!!

Answer 1

There's a simple way to do this, here you go:
$message->attach(
Swift_Attachment::fromPath('/path/to/image.jpg')->setFilename('myfilename.jpg')
);
That's one way SwiftMail can do this, now just the /tmp file, and turn the above into the following:
Assuming: fileatt is the variable for the $_FILE, ['tmp_name'] actually is the tmp file that PHP creates from the form upload.
$message->attach(
Swift_Attachment::fromPath($_FILES['fileatt']['tmp_name'])->setFilename($_FILES['fileatt']['name'])
);
More information on SwiftMail Attachments can be found on this docs page
More information on $_FILES can be found here on w3schools, despite I don't like w3schools, this page is solid.

Answer 2

Another way to do this, using only a single variable for path and filename is:
$message->attach(Swift_Attachment::fromPath('full-path-with-attachment-name'));

Answer 3

Single Attachment
My answer is similar to that of André Catita. However, in Laravel 6 you can use $request instead of $_FILES. Let me simplify the code above:
$path = $request->file('import')->getPathName();
$fileName = $request->file('import')->getClientOriginalName();
$message->attach(
Swift_Attachment::fromPath($path)->setFilename($fileName)
);
Here I assume that the name of your file tag is import. For eg: <input type="file" name="import" />
Multiple Attachments
Now, lets say instead of single attachment you need multiple attachments. Then the code needs to be changed.
First your html code will become: <input type="file" name="import[]" multiple />
And for backend or laravel; code will be:
$files = $request->file('import');
foreach($files as $file){
$path = $file->getPathName();
$fileName = $file->getClientOriginalName();
$message->attach(
Swift_Attachment::fromPath($path)->setFilename($fileName)
);
}