IMAP - ＆gt; Gmail - 提取附件，然后删除电子邮件

Question

我正在运行连接到我的Gmail帐户的cronjob，并从包含特定主题的电子邮件中提取CSV文件。然后将附件保存在我的服务器上，稍后将其选中以进行进一步处理。

现在的问题是cronjob每15分钟执行一次，导致大量的电子邮件，并且当附件加起来时自然会浪费邮箱空间。我想要做的是在我提取附件后删除电子邮件，但在使用imap_delete和`imap_expunge＆＃39;时，电子邮件仍保留在收件箱中。

删除并删除

/* delete and expunge email after attachment has been exported */
imap_delete($inbox,$email_number);
imap_expunge($inbox,$email_number);

完整代码：

<?php
set_time_limit(3000); 


/* connect to gmail */
$hostname = '{imap.gmail.com:993/imap/ssl}INBOX';
$username = 'YOUR_GMAIL_USERNAME'; # e.g somebody@gmail.com
$password = 'YOUR_GMAIL_PASSWORD';


/* try to connect */
$inbox = imap_open($hostname,$username,$password) or die('Cannot connect to Gmail: ' . imap_last_error());


/* get all NEW emails with subject line only  */
/* UPDATED as per Max' suggestion  */
$emails = imap_search($inbox,'NEW SUBJECT "Automated Report 123"');

/* if any emails found, iterate through each email */
if($emails) {

    $count = 1;

    /* put the newest emails on top */
    rsort($emails);

    /* for every email... */
    foreach($emails as $email_number) 
    {

        /* get information specific to this email */
        $overview = imap_fetch_overview($inbox,$email_number,0);

        $message = imap_fetchbody($inbox,$email_number,2);

        /* get mail structure */
        $structure = imap_fetchstructure($inbox, $email_number);

        $attachments = array();

        /* if any attachments found... */
        if(isset($structure->parts) && count($structure->parts)) 
        {
            for($i = 0; $i < count($structure->parts); $i++) 
            {
                $attachments[$i] = array(
                    'is_attachment' => false,
                    'filename' => '',
                    'name' => '',
                    'attachment' => ''
                );

                if($structure->parts[$i]->ifdparameters) 
                {
                    foreach($structure->parts[$i]->dparameters as $object) 
                    {
                        if(strtolower($object->attribute) == 'filename') 
                        {
                            $attachments[$i]['is_attachment'] = true;
                            $attachments[$i]['filename'] = $object->value;
                        }
                    }
                }

                if($structure->parts[$i]->ifparameters) 
                {
                    foreach($structure->parts[$i]->parameters as $object) 
                    {
                        if(strtolower($object->attribute) == 'name') 
                        {
                            $attachments[$i]['is_attachment'] = true;
                            $attachments[$i]['name'] = $object->value;
                        }
                    }
                }

                if($attachments[$i]['is_attachment']) 
                {
                    $attachments[$i]['attachment'] = imap_fetchbody($inbox, $email_number, $i+1);

                    /* 3 = BASE64 encoding */
                    if($structure->parts[$i]->encoding == 3) 
                    { 
                        $attachments[$i]['attachment'] = base64_decode($attachments[$i]['attachment']);
                    }
                    /* 4 = QUOTED-PRINTABLE encoding */
                    elseif($structure->parts[$i]->encoding == 4) 
                    { 
                        $attachments[$i]['attachment'] = quoted_printable_decode($attachments[$i]['attachment']);
                    }
                }
            }
        }

        /* iterate through each attachment and save it */
        foreach($attachments as $attachment)
        {
            if($attachment['is_attachment'] == 1)
            {
                $filename = $attachment['name'];
                if(empty($filename)) $filename = $attachment['filename'];

                if(empty($filename)) $filename = time() . ".dat";

                /* prefix the email number to the filename in case two emails
                 * have the attachment with the same file name.
                 */
                $fp = fopen("./" . $email_number . "-" . $filename, "w+");
                fwrite($fp, $attachment['attachment']);
                fclose($fp);
            }

        }

        if($count++ >= $max_emails) break;

        /* delete and expunge email after attachment has been exported */
        imap_delete($inbox,$email_number);
        imap_expunge($inbox,$email_number);
    }

} 

/* close the connection */
imap_close($inbox);

echo "Done";

?>