我在PHP中遇到IMAP资源问题：我对以下代码的错误supplied is not a valid imap resource：
$imap = imap_open("{"."$host:$port/imap$ssl"."}$folder", $user, $pass);
imap_headers($imap);
$new_emails = imap_search($imap, "UNSEEN");
imap_close($imap);
$counter = $counter+count($new_emails);
我收到以下错误：
warning: imap_close(): supplied is not a valid imap resource on line 896.
warning: imap_headers(): supplied is not a valid imap resource on line 892.
warning: imap_search(): supplied is not a valid imap resource on line 894.
修改
我现在也得到了：
NO IMAP CONNECTION Notice: Undefined variable: imap_connection in /var/www/vhosts/talent.co.uk/httpdocs/intranet/model/helpdesk_finance_admin.php on line 214
Warning: imap_getmailboxes(): supplied argument is not a valid imap resource in /var/www/vhosts/talent.co.uk/httpdocs/intranet/model/helpdesk_finance_admin.php on line 216
Notice: Undefined variable: imap_connection in /var/www/vhosts/talent.co.uk/httpdocs/intranet/model/helpdesk_finance_admin.php on line 220
Warning: imap_headers(): supplied argument is not a valid imap resource in /var/www/vhosts/talent.co.uk/httpdocs/intranet/model/helpdesk_finance_admin.php on line 220
Notice: Undefined variable: imap_connection in /var/www/vhosts/talent.co.uk/httpdocs/intranet/model/helpdesk_finance_admin.php on line 222
Connection failed! Notice: Undefined property: model::$no_mail in /var/www/vhosts/talent.co.uk/httpdocs/intranet/view/helpdesk_finance_admin.php on line 1346
Warning: Invalid argument supplied for foreach() in /var/www/vhosts/talent.co.uk/httpdocs/intranet/view/helpdesk_finance_admin.php on line 1403
答案 0 :(得分：0)
最有可能出现错误，imap_open返回FALSE，这不是传递给imap_close的有效资源。
始终检查可能失败的操作结果
答案 1 :(得分：0)
登录详细信息错误，因此imap无法连接，因此会导致错误代码。
答案 2 :(得分：0)
尝试使用此语法 {webmail.talent.co.uk:993/imap/ssl/novalidate-cert}INBOX