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用php得到163的邮件信息

$host='pop.163.com';
$port=110;
$user='******';
$passWord='******';

if(!($sock=fsockopen(gethostbyname($host),$port,$errno,$errstr)))
    exit($errno.': '.$errstr);
set_socket_blocking($sock,true);

$msg=fgets($sock);
echo $msg;

$command="user ".$user."\r\n";
fwrite($sock,$command);
$msg=fgets($sock);
echo $msg;

$command="pass ".$password."\r\n";
fwrite($sock,$command);
$msg=fgets($sock);
echo $msg;

$command="stat\r\n";
fwrite($sock,$command);
$msg=fgets($sock);
echo $msg;

$command="list\r\n";
fwrite($sock,$command);
while(true)
{
    $msg=fgets($sock);   
    echo $msg;
    if(PReg_match('/^\./',$msg))
        break;
}

$command="retr 1\r\n";
fwrite($sock,$command);
while(true)
{
    $msg=fgets($sock);
    echo $msg;
    if(preg_match('/^\.(\r\n)$/',$msg))
        break;
}

$command="quit\r\n";
fwrite($sock,$command);
$msg=fgets($sock);
echo $msg;
?>