Php imap email function

<?php

// specification:
$username="emailid";
$password="password";

$mbox = imap_open ("{imap.gmail.com:993/imap/ssl}",$username,$password)
     or die("can't connect: " . imap_last_error());
     //imap_reopen($connection,'{imap.gmail.com}INBOX');

        $list = imap_list($mbox, "{imap.gmail.com:993/imap/ssl}INBOX", "*");

   
/*$xx=imap_reopen($mbox,'{imap.gmail.com:993/imap/ssl}INBOX');
echo "asdasd".$num_mgs = imap_num_msg($mbox);
$list = imap_list($mbox,"{imap.gmail.com:993/imap/ssl}INBOX", "*");
//$list =imap_getmailboxes($mbox,"{imap.gmail.com:993/imap/ssl}INBOX", "*");
 echo "<pre>";
     print_r($list);
     echo "</pre>";
echo "<h1>Headers in INBOX</h1>\n";
$headers = imap_headers($mbox);

if ($headers == false) {
    echo "Call failed<br />\n";
} else {
    foreach ($headers as $val) {
        echo $val . "<br />\n";
    }
}
echo "<h1>Mailboxes</h1>\n";
/*$folders = imap_listmailbox($mbox,"{imap.gmail.com:993/imap/ssl}INBOX","*");

if ($folders == false) {
    echo "Call failed<br />\n";
} else {
    foreach ($folders as $val) {
        echo $val . "<br />\n";
    }
}


$MC = imap_check($mbox);

// Fetch an overview for all messages in INBOX
$result = imap_fetch_overview($mbox,"1:{$MC->Nmsgs}",0);
foreach ($result as $overview) {
    echo "#{$overview->msgno} ({$overview->date}) - From: {$overview->from}
    {$overview->subject}\n";
}
*/
$message_count = imap_num_msg($mbox);

 for ($i = $message_count; $i== $message_count; $i++) {
       /* $header = imap_header($mbox, $i);
        $body = trim(substr(imap_body($mbox, $i), 0, 100));
        $prettydate = date("jS F Y", $header->udate);

        if (isset($header->from[0]->personal)) {
            $personal = $header->from[0]->personal;
        } else {
            $personal = $header->from[0]->mailbox;
        }

        $email = "$personal <{$header->from[0]->mailbox}@{$header->from[0]->host}>";
        echo "On $prettydate, $email said \"$body\".\<br>";*/
            //$header=imap_header($mbox,$i);
            /*echo "From: $header[fromaddress]<br>";
            echo "To: $header[toaddress]<br>";
            echo "Date: $header[Date]<br>";
            echo "Subject: $header[Subject]<br><br>";*/
            echo imap_body($mbox,$i);

    }

    // pull the plain text for message $n
/*$st = imap_fetchstructure($mbox, $message_count);
if (!empty($st->parts)) {
    for ($i = 0, $j = count($st->parts); $i < $j; $i++) {
        $part = $st->parts[$i];
        if ($part->subtype == 'PLAIN') {
             $body = imap_fetchbody($mbox, $message_count,$i+1);
        }
     }
} else {
    $body = imap_body($mbox,$message_count);
}*/
imap_close($mbox);



?>