以前见到的PHP邮件功能，不错还是不错的

<?
/* Pop3 Functions.
Smtp Functions. [Added later, going to split]

For a real example take a look at:
http://www.triple-it.nl/pop3/

I have just started to explore the world of PHP3,
so excuse (and correct me :) if I'm doing something wrong.

Unk. (rgroesb@triple-it.nl)
*/

function pop3_open($server, $port)
{
global $POP3_GLOBAL_STATUS;

$pop3 = fsockopen($server, $port);
if ($pop3 <= 0) return 0;

$line = fgets($pop3, 1024);
$POP3_GLOBAL_STATUS[$pop3]["LASTRESULT"] = substr($line, 0, 1);
$POP3_GLOBAL_STATUS[$pop3]["LASTRESULTTXT"] = substr($line, 0, 1024);

if ($POP3_GLOBAL_STATUS[$pop3]["LASTRESULT"] <> "+") return 0;

return $pop3;
}

function pop3_user($pop3, $user)
{
global $POP3_GLOBAL_STATUS;

fputs($pop3, "USER $user");
$line = fgets($pop3, 1024);
$POP3_GLOBAL_STATUS[$pop3]["LASTRESULT"] = substr($line, 0, 1);
$POP3_GLOBAL_STATUS[$pop3]["LASTRESULTTXT"] = substr($line, 0, 1024);

if ($POP3_GLOBAL_STATUS[$pop3]["LASTRESULT"] <> "+") return 0;

return 1;
}

function pop3_pass($pop3, $pass)
{
global $POP3_GLOBAL_STATUS;

fputs($pop3, "PASS $pass");
$line = fgets($pop3, 1024);
$POP3_GLOBAL_STATUS[$pop3]["LASTRESULT"] = substr($line, 0, 1);
$POP3_GLOBAL_STATUS[$pop3]["LASTRESULTTXT"] = substr($line, 0, 1024);

if ($POP3_GLOBAL_STATUS[$pop3]["LASTRESULT"] <> "+") return 0;

return 1;
}

function pop3_stat($pop3)
{
global $POP3_GLOBAL_STATUS;

fputs($pop3, "STAT");
$line = fgets($pop3, 1024);
$POP3_GLOBAL_STATUS[$pop3]["LASTRESULT"] = substr($line, 0, 1);
$POP3_GLOBAL_STATUS[$pop3]["LASTRESULTTXT"] = substr($line, 0, 1024);

if ($POP3_GLOBAL_STATUS[$pop3]["LASTRESULT"] <> "+") return 0;

if (!eregi("+OK (.*) (.*)", $line, $regs))
return 0;

return $regs[1];
}

function pop3_list($pop3)
{
global $POP3_GLOBAL_STATUS;

fputs($pop3, "LIST");
$line = fgets($pop3, 1024);
$POP3_GLOBAL_STATUS[$pop3]["LASTRESULT"] = substr($line, 0, 1);
$POP3_GLOBAL_STATUS[$pop3]["LASTRESULTTXT"] = substr($line, 0, 1024);

if ($POP3_GLOBAL_STATUS[$pop3]["LASTRESULT"] <> "+") return 0;

$i = 0;
while (substr($line = fgets($pop3, 1024), 0, 1) <> ".")
{
$articles[$i] = $line;
$i++;
}
$articles["count"] = $i;

return $articles;
}

function pop3_retr($pop3, $nr)
{
global $POP3_GLOBAL_STATUS;

fputs($pop3, "RETR $nr");
$line = fgets($pop3, 1024);
$POP3_GLOBAL_STATUS[$pop3]["LASTRESULT"] = substr($line, 0, 1);
$POP3_GLOBAL_STATUS[$pop3]["LASTRESULTTXT"] = substr($line, 0, 1024);

if ($POP3_GLOBAL_STATUS[$pop3]["LASTRESULT"] <> "+") return 0;

while (substr($line = fgets($pop3, 1024), 0, 1) <> ".")
{
/t $data[$i] = $line;
/t $i++;
}
$data["count"] = $i;

return $data;
}

function pop3_dele($pop3, $nr)
{
global $POP3_GLOBAL_STATUS;

fputs($pop3, "DELE $nr");
$line = fgets($pop3, 1024);
$POP3_GLOBAL_STATUS[$pop3]["LASTRESULT"] = substr($line, 0, 1);
$POP3_GLOBAL_STATUS[$pop3]["LASTRESULTTXT"] = substr($line, 0, 1024);

if ($POP3_GLOBAL_STATUS[$pop3]["LASTRESULT"] <> "+") return 0;

return 1;
}

function pop3_quit($pop3)
{
global $POP3_GLOBAL_STATUS;

fputs($pop3, "QUIT");
$line = fgets($pop3, 1024);
$POP3_GLOBAL_STATUS[$pop3]["LASTRESULT"] = substr($line, 0, 1);
$POP3_GLOBAL_STATUS[$pop3]["LASTRESULTTXT"] = substr($line, 0, 1024);

if ($POP3_GLOBAL_STATUS[$pop3]["LASTRESULT"] <> "+") return 0;

return 1;
}

function smtp_open($server, $port)
{
global $SMTP_GLOBAL_STATUS;

$smtp = fsockopen($server, $port);
if ($smtp < 0) return 0;

$line = fgets($smtp, 1024);
$SMTP_GLOBAL_STATUS[$smtp]["LASTRESULT"] = substr($line, 0, 1);
$SMTP_GLOBAL_STATUS[$smtp]["LASTRESULTTXT"] = substr($line, 0, 1024);

if ($SMTP_GLOBAL_STATUS[$smtp]["LASTRESULT"] <> "2") return 0;

return $smtp;
}

function smtp_helo($smtp)
{
global $SMTP_GLOBAL_STATUS;

/* 'localhost' always works [Unk] */
fputs($smtp, "helo localhost");
$line = fgets($smtp, 1024);
$SMTP_GLOBAL_STATUS[$smtp]["LASTRESULT"] = substr($line, 0, 1);
$SMTP_GLOBAL_STATUS[$smtp]["LASTRESULTTXT"] = substr($line, 0, 1024);

if ($SMTP_GLOBAL_STATUS[$smtp]["LASTRESULT"] <> "2") return 0;

return 1;
}

function smtp_ehlo($smtp)
{
global $SMTP_GLOBAL_STATUS;

/* Well, let's use "helo" for now.. Until we need the
/t extra func's [Unk]
*/
fputs($smtp, "helo localhost");
$line = fgets($smtp, 1024);
$SMTP_GLOBAL_STATUS[$smtp]["LASTRESULT"] = substr($line, 0, 1);
$SMTP_GLOBAL_STATUS[$smtp]["LASTRESULTTXT"] = substr($line, 0, 1024);

if ($SMTP_GLOBAL_STATUS[$smtp]["LASTRESULT"] <> "2") return 0;

return 1;
}

function smtp_mail_from($smtp, $from)
{
global $SMTP_GLOBAL_STATUS;

fputs($smtp, "MAIL FROM: <$from>");
$line = fgets($smtp, 1024);
$SMTP_GLOBAL_STATUS[$smtp]["LASTRESULT"] = substr($line, 0, 1);
$SMTP_GLOBAL_STATUS[$smtp]["LASTRESULTTXT"] = substr($line, 0, 1024);

if ($SMTP_GLOBAL_STATUS[$smtp]["LASTRESULT"] <> "2") return 0;

return 1;
}

function smtp_rcpt_to($smtp, $to)
{
global $SMTP_GLOBAL_STATUS;

fputs($smtp, "RCPT TO: <$to>");
$line = fgets($smtp, 1024);
$SMTP_GLOBAL_STATUS[$smtp]["LASTRESULT"] = substr($line, 0, 1);
$SMTP_GLOBAL_STATUS[$smtp]["LASTRESULTTXT"] = substr($line, 0, 1024);

if ($SMTP_GLOBAL_STATUS[$smtp]["LASTRESULT"] <> "2") return 0;

return 1;
}

function smtp_data($smtp, $subject, $data)
{
global $SMTP_GLOBAL_STATUS;

fputs($smtp, "DATA");
$line = fgets($smtp, 1024);
$SMTP_GLOBAL_STATUS[$smtp]["LASTRESULT"] = substr($line, 0, 1);
$SMTP_GLOBAL_STATUS[$smtp]["LASTRESULTTXT"] = substr($line, 0, 1024);

if ($SMTP_GLOBAL_STATUS[$smtp]["LASTRESULT"] <> "3") return 0;

fputs($smtp, "Mime-Version: 1.0");
fputs($smtp, "Subject: $subject");
fputs($smtp, "$data");
fputs($smtp, ".");
$line = fgets($smtp, 1024);
if (substr($line, 0, 1) <> "2")
return 0;

return 1;
}

function smtp_quit($smtp)
{
global $SMTP_GLOBAL_STATUS;

fputs($smtp, "QUIT");
$line = fgets($smtp, 1024);
$SMTP_GLOBAL_STATUS[$smtp]["LASTRESULT"] = substr($line, 0, 1);
$SMTP_GLOBAL_STATUS[$smtp]["LASTRESULTTXT"] = substr($line, 0, 1024);

if ($SMTP_GLOBAL_STATUS[$smtp]["LASTRESULT"] <> "2") return 0;

return 1;
}

/*
$pop3 = pop3_open("localhost", "110");
if (!$pop3) {
printf("[ERROR] Failed to connect to localhost<BR>");
return 0;
}

if (!pop3_user($pop3, "unk")) {
printf("[ERROR] Username failed!<BR>");
return 0;
}

if (!pop3_pass($pop3, "secret")) {
printf("[ERROR] PASS failed!<BR>");
return 0;
}

$articles = pop3_list($pop3);
if (!$articles) {
printf("[ERROR] LIST failed!<BR>");
return 0;
}

for ($i = 1; $i < $articles ["count"] + 1; $i++)
{
printf("i=$i<BR>");
$data = pop3_retr($pop3,$i);
if (!$data) {
printf("data goes wrong on '$i'<BR>");
return 0;
}

for ($j = 0; $j < $data["count"]; $j++)
{
printf("$data[$j]<BR>");
}
}
*/


?>

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