Basics of PHP Frameworks

Below is a list of functions I need to build into the app - how much would already exist in the framework?

1. Check IMAP email Inbox
   
2. Get message and check for attachment
   
3. Extract attachment and read contents of text file
   
4. Re-format and export into CSV
   
5. SFTP CSV to another server
   
6. Send CSV as attachment
   

CodeIgniter will do none of this, and I'm not aware of any frameworks that have IMAP and SFTP libraries. You're going to need to find these libraries, or make your own.

For SFTP, I use phpseclib. It works great.

For IMAP, I made my own, but can't share because it's something that I was paid to create.

For imap, i am using zend mail .

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A framework should not do all the things.

That's interesting. It works with CI, or you wouldn't mention it, right? ... and it does all of the things OP was asking for related to IMAP? If it does, can you link me up?

https://docs.zendframework.com/zend-mail/

PHP Code:

// Connecting with Imap:
$mail = new Imap([
    'host'     => 'xxx',
    'user'     => 'xxx',
    'password' => 'xxx',
]);

foreach ($mail as $messageNum => $message) {
    echo $message->subject;

    // Check for attachment
    if ($message->isMultipart()) {
        foreach ($message as $part) {
            if ($part->getHeaders()->has('Content-Disposition')) {
                $fileName = $part->getHeader('Content-Description')->getFieldValue();

                $content = base64_decode($part->getContent());

                file_put_contents(__DIR__.'/'.$fileName,$content);
            }

        }
    }
} 


@skunkbad an example for you. codeigniter work with composer.