Adding content by email

// To connect to a POP3 server on port 110 on the local server, use:
$mbox = imap_open ("{localhost:110/pop3}INBOX", "user_id", "password");

imap_open("{pop.gmail.com:995/pop3/ssl/novalidate-cert}INBOX", $username, $pasword);

$mbox = imap_open("{pop.gmail.com:993/pop3/ssl/novalidate-cert}INBOX", $username, $pasword);

imap_num_msg(): supplied argument is not a valid imap resource

<?php
$uname = '[email protected]'; // mailbox login
$upass = 'passwd'; // mailbox password
$mailserver = 'imap.gmail.com'; // mail server name, or use localhost
$parent = 3; // the ID of the parent document for these documents

// connect to the mail server
$mbox = imap_open("{imap.gmail.com:993/imap/ssl/readonly}INBOX", $uname, $upass, OP_READONLY);
//$total = imap_num_msg($inbox);
//echo $total; // if you get a number here, you're in business!!
// ^^didn't work - imap_num_msg(): supplied argument is not a valid imap resource

 $listing = imap_search($mbox, "TO yankeedeuce");
foreach($listing as $msg) {
    $message = imap_body($mbox, $msg);

$header = imap_header($mbox, $msg); 
$from = $header->from;
foreach ($from as $id => $object) {
    $fromname = $object->personal; //from name
    $fromaddress = $object->mailbox . "@" . $object->host; // from email address
}
$articletitle = $header->subject; // subject line
$articledate = $header->date; // date sent

    echo "<h3>$articletitle</h3> From: $fromname ($fromaddress) <br/> $articledate <p>$message</p><br />";
}
?>