这是一段Web Mail的示范代码，功能不是很强，但是结构还比较完整，主要的功能如查看文件夹，查看信件，回复，写信都有。但是程序中没有考虑附件解读和发送的问题。 (原文在 这里)。仅推荐给希望了解Webmail编程的网友做个参考。更加完善的Webmail请大家到 这里查找。
请注意：程序中使用了http认证功能，此功能需配合apache服务器使用。
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将以下代码分别存为 index.php3, imapfuncs.phl
配置imapfuncs.phl文件中的$M_HOST = "localhost"; $M_MAILSERVER = "transit.fast.no";
然后浏览 index.php3 即可.  
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index.php3
/* $Id: index.php3,v 1.3 1999/04/14 12:12:32 borud Exp $ */
/* load the IMAP library functions we\'ve written */
include("imapfuncs.phl");
m_login($m);
?>

---

if ($cmd == "delete") {
m_delete($marked, $m);
m_list($m);
}
elseif ($cmd == "display") {
m_display($n, $m);
}
elseif ($cmd == "compose" || $cmd == "reply") {
m_compose($n, $m);
}
elseif ($cmd == "send") {
m_send($to, $subject, $body);
m_list($m);
}
else {
m_list($m);
}
?>

---

--------------------------------------------------------------------------------
imapfuncs.phl
/* $Id: imapfuncs.phl,v 1.4 1999/04/14 12:12:32 borud Exp $ */
/* configurable parameters */
$M_HOST = "localhost";
$M_MAILSERVER = "transit.fast.no\";
$M_COLOR_ODD = "#CCCCCC";
$M_COLOR_EVEN = "#EEEEEE";
$M_COLOR_HEAD = "#AAAAFF";
$M_COLOR_BG = "#FFFFFF";
/* globals */
$M_PORT = 143;
$M_SERVICE = "imap";
$M_SYSNAME = "Simple PHP3 IMAP Interface 1.0";
$M_MBOX = "{$M_HOST:$M_PORT/$M_SERVICE}";
$M_REALM = "IMAP Interface";
$MBOX = false;
/* functions */
function m_login ($mailbox = '')
{
global $MBOX, $M_REALM;
global $PHP_AUTH_USER, $PHP_AUTH_PW;
if ($MBOX) {
return true;
}
if (! $PHP_AUTH_USER) {
m_reject($M_REALM);
}
$MBOX = @imap_open(m_mailbox_name($mailbox), $PHP_AUTH_USER, $PHP_AUTH_PW);
if (! $MBOX) {
m_reject($M_REALM);
}
return true;
}
function m_list($mailbox = '')
{
global $MBOX, $PHP_SELF;
global $M_COLOR_ODD, $M_COLOR_EVEN, $M_COLOR_HEAD, $M_COLOR_BG;
/* if not logged into server, do so */
if (! $MBOX) {
if (! m_login($mailbox)) {
return false;
}
}
$num = imap_num_msg($MBOX);
echo "

\n";
echo "\n";
echo "";
echo "";
echo "\n";
for ($i=1; $i $head = imap_header($MBOX, $i, 50, 50, 0);
$from = $head->fetchfrom;
$subj = $head->fetchsubject;
$date = m_date_format($head->date);
$bgcolor = ($i%2 == 0)?$M_COLOR_ODD:$M_COLOR_EVEN;
echo "\n";
echo " \n";
echo " ";
echo "";
echo "\n";
echo "\n";
}
if ($num echo "\n";
}
echo "\n";
echo "

	From	Subject	Date
	$from	$subj	$date
"; echo "No messages in mailbox"; echo "
"; echo ""; echo ""; echo ""; echo "

\n";
echo "

\n";
return true;
}
function m_display($msgno, $mailbox = '')
{
global $MBOX, $M_COLOR_HEAD, $M_COLOR_BG;
global $PHP_SELF;
if (! $MBOX) {
if (! m_login($mailbox)) {
return false;
}
}
$struc = imap_fetchstructure($MBOX, $msgno);
if (! $struc) {
return false;
}
$head = imap_header($MBOX, $msgno, 50, 50, 0);
$from = $head->fromaddress;
$subj = $head->subject;
$date = $head->date;
$body = htmlentities(imap_body($MBOX, $msgno));
echo "\n";
echo "\n";
echo "\n";
echo "\n";
echo "\n";
echo "

Message #$msgno: $from / $subj
\n"; echo "From: $from\n"; echo "Subject: $subj\n"; echo "Date: $date\n"; echo " \n"; echo "$body\n"; echo "
"; echo " "; echo "\n"; echo "\n"; echo "\n"; echo ""; echo ""; echo "     "; echo "

\n";
echo "\n";
return true;
}
function m_delete ($msgno, $mailbox='')
{
global $MBOX;
if (is_array($msgno)) {
while (list($dummy, $num) = each($msgno)) {
imap_delete($MBOX, $num);
}
imap_expunge($MBOX);
} else {
return false;
}
return true;
}
function m_compose ($msgno='', $mailbox='')
{
global $MBOX, $M_COLOR_HEAD, $M_COLOR_BG;
global $PHP_SELF, $PHP_AUTH_USER, $M_MAILSERVER;
if ($msgno != '') {
$head = imap_header($MBOX, $msgno, 150, 150, 0);
$to = $head->fromaddress;
$subject = "Re: " . $head->subject;
$body = "$to wrote:\n";
$body .= ereg_replace("\n","\n>", "\n" . imap_body($MBOX, $msgno));
} else {
$to = "";
$subject = "";
$body = "";
}
echo "\n";
echo "

\n";
echo "\n";
echo "";
echo "\n";
echo "";
echo "\n";
echo "

To:
Subject:
"; echo "$body";  以上就介绍了winwebmail 构建简单的Webmail系统，包括了winwebmail方面的内容，希望对PHP教程有兴趣的朋友有所帮助。