关于imap_scanmailbox函数

[aivera]

谁告诉我imap_scanmailbox函数到底怎么用?


不要告诉我用imap_listscan

<?php

$imap = imap_open("{localhost}INBOX","admin","admin");

// list all mailboxes containing 'hello'

$boxes = imap_scanmailbox($imap, "{localhost}", "*", "hello");

for ($i=0; $i<count($boxes); $i++)
{
echo "Mailbox: $boxes[$i]<BR>\n";
}

imap_close($imap);
?>

理论上应该输出:
Mailbox:INBOX

可是就是没有结果,不知道哪里出了问题,还是imap_scanmailbox不能用了?