Parse an inbound email webhook and create a new GitHub issue containing any attached images.

email-to-github.php

<?PHP
    // Note: This script relies on Postmark to parse the email's contents into JSON.
    // More info here: https://postmarkapp.com/

    $post = trim(file_get_contents('php://input'));
    $email = json_decode($post);
    if(is_null($email)) {
        exit;
    }

    // If you're dealing with multiple repos (apps), you can setup any number of
    // forwarding email addresses and then post to the appropriate repo based on
    // which address you forwarded the user's email to.
    if($email->To == 'app1@mydomain.com') {
        create_github_issue('github-username', 'app1repo', $email);
    }

    if($email->To == 'app2@mydomain.com') {
        create_github_issue('github-username', 'app2repo', $email);
    }

    function create_github_issue($owner, $repo, $email) {
        // Create a Personal Access Token here...
        // https://github.com/settings/tokens
        // Token must have full repo permissions.
        $github_personal_access_token = '';

        $headers = array("Authorization: token $github_personal_access_token", 'User-Agent: Email-To-Issue-Bot');

        $attachment_dir = 'github-attachments/'; // Path to where you want image attachments saved. Can be relative to this script or absolute.
        $attachment_url = 'https://mydomain.com/github-attachments/'; // Public URL to directory where attachments are available.

        $json = array();
        $json['title'] = $email->Subject;
        $json['body'] = $email->TextBody;
        $json['labels'] = array('via-email'); // List any tags you want applied to the new issue. You must create these tags in GitHub first.

        foreach($email->Attachments as $a) {
            if(strpos($a->ContentType, 'image') !== false) {
                // Get the attachment's file extension
                $parts = explode('.', $a->Name);
                $ext = array_pop($parts);

                // Create a unique filename
                $fn = md5(microtime() . $a->Name) . ".$ext";

                // Open a writable file handle and save the attachment data
                $fp = fopen(rtrim($attachment_dir, '/') . '/' . $fn, 'w');
                $data = base64_decode($a->Content);
                fwrite($fp, $data);
                fclose($fp);

                // Embed the attachment's public URL as a Markdown image in the issue's body content so we can see it on GitHub
                $url = rtrim($attachment_url, '/') . '/' . $fn;
                $json['body'] .= "\n\n![{$a->Name}]($url)";
            }
        }

        // Create the new GitHub issue
        $ch = curl_init("https://api.github.com/repos/$owner/$repo/issues");
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($json));
        curl_exec($ch);
        curl_close($ch);
    }