imap_delete not working

I am using php imap functions to parse the message from webmail. I can fetch messages one by one and save them in DB. After saving, I want to delete the inbox message. imap_delete function is not working here. My code is like that:

$connection = pop3_login($host,$port,$user,$pass,$folder="INBOX",$ssl=false);//connect
$stat = pop3_list($connection);//list messages

foreach($stat as $line) {
  //save in db开发者_如何学Go codes...
  imap_delete($connection, $line['msgno']);//flag as delete
}

imap_close($connection, CL_EXPUNGE);

I also tested - imap_expunge($connection);

But it is not working. The messages are not deleted. Please help me out...

---

You are mixing POP and IMAP.

That is not going to work. You need to open the connection with IMAP. See this example:

<?php

$mbox = imap_open("{imap.example.org}INBOX", "username", "password")
    or die("Can't connect: " . imap_last_error());

$check = imap_mailboxmsginfo($mbox);
echo "Messages before delete: " . $check->Nmsgs . "<br />\n";

imap_delete($mbox, 1);

$check = imap_mailboxmsginfo($mbox);
echo "Messages after  delete: " . $check->Nmsgs . "<br />\n";

imap_expunge($mbox);

$check = imap_mailboxmsginfo($mbox);
echo "Messages after expunge: " . $check->Nmsgs . "<br />\n";

imap_close($mbox);
?>

---

Actually the functions names are like pop3. but they perform imap functionality. like -

function pop3_login($host,$port,$user,$pass,$folder="INBOX",$ssl=false)
{
    $ssl=($ssl==false)?"/novalidate-cert":"";
    return (imap_open("{"."$host:$port/pop3$ssl"."}$folder",$user,$pass));
}
function pop3_list($connection,$message="")
{
    if ($message)
    {
        $range=$message;
    } else {
        $MC = imap_check($connection);
        $range = "1:".$MC->Nmsgs;
    }
    $response = imap_fetch_overview($connection,$range);
    foreach ($response as $msg) $result[$msg->msgno]=(array)$msg;
        return $result;
}