警告：imap_open（）：使用IMAP提取电子邮件时，无法打开流{imap.outlook.com:993/imap/ssl}INBOX

Question

我已经尝试使用以下代码通过Outlook中的php imap获取电子邮件。出现以下错误

警告：imap_open（）：无法打开流{imap.outlook.com:993/imap/ssl}收件箱

我尝试了以下代码

set_time_limit(3000); 
/* connect to outlook with your credentials */
$hostname = '{imap.outlook.com:993/imap/ssl}INBOX';
$username = 'xyz@mail.com';
$password = '********';

$allowed_extensions = array('xml');
/* try to connect */
$inbox = imap_open($hostname,$username,$password) or die('Cannot connect to Outlook: ' . imap_last_error());
$sender_id = $this->getConfig(self::XML_PATH_ORDER_PROCESSING_EMAIL);
$subjects = array('D2O AccountID', 'D2O ASN');

foreach ($subjects as $key => $subjectValue) {
    $emails = imap_search($inbox, 'UNSEEN FROM "'.$sender_id.'" SUBJECT "'.$subjectValue.'"');
    /* 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']);
                        }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 && in_array(pathinfo($attachment['name'], PATHINFO_EXTENSION), $allowed_extensions) )
                {
                    $filename = $attachment['name'];
                    if(empty($filename)) $filename = $attachment['filename'];

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

                    $folder = $subjectValue == 'D2O AccountID' ? 'ORDER_STATUS' : 'ASN_DATA' ;
                    $folderPath =   $this->_filesystem->getDirectoryRead(DirectoryList::MEDIA)->getAbsolutePath().'/'.$folder;

                    if(!is_dir($folderPath)){
                        mkdir($folderPath);
                    }
                    $fp = fopen($folderPath ."/".$filename, "w+");
                    fwrite($fp, $attachment['attachment']);
                    fclose($fp);
                }
            }
            imap_setflag_full($inbox, $email_number, "\\Seen \\Flagged", ST_UID); 
        }
    } 
}

上面的代码曾经可以正常工作，但突然出现问题。我已经为此工作了很多天。请帮助。