流明：IMAP库搜索日期不起作用

Question

I am using below library in my composer.json file

"php-imap/php-imap": "3.0.*",

My code is below,

$folder['shortpath']="Inbox";
    new \PhpImap\Mailbox('{'.$mdata["server"].":993/imap/ssl}". $folder['shortpath'], $mdata["user"], $mdata["pass"], $dir);
                        $mailsIds = $mailbox->searchMailbox($mailbox, 'SINCE "01 December 2018"');
                        echo"<pre>";print_r($mailsIds);die;

It gives me empty array instead of value of UIDs

I have total 4 emails after 1st december

If I am using below code,

$mailsIds = $mailbox->searchMailbox("ALL");
                            echo"<pre>";print_r($mailsIds);die;

then it gives me all emails till date in inbox

but date wise seach is not working

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if I write below code then it gives error:

 $mailsIds = $mailbox->searchMailbox('SINCE 01 December 2018');

ERROR:

IMAP method imap_search() failed with error: Unknown search criterion: SINCE 2018-12-06 09:32:32←

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I found my solution as below , it is working for me,

I have userd

mailsIds = $mailbox->searchMailbox('SINCE "01 December 2018"');

but while open connection pass one more argument for "US-ASCII"

new \PhpImap\Mailbox('{'.$mdata["server"].":993/imap/ssl}".
                    $folder['shortpath'], $mdata["user"], $mdata["pass"], $dir, "US-ASCII");

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But my another question is it is gives me list of new messages based on given date,

I required all update emails also like new mail, mark as unread, flagged , unflagged etc from given date. How to achive this??

Means how to identify new emails and any activity on existing emails till given date