php 用sock技術發送郵件的函數

使用sock技術發郵件，無需服務器支持。速度快！！

[code]
function send_mail($to,$subject,$body)
{
/////////////Smtp信息，可以修改成你的，//////////
$loc_host = "longbill"; //發信計算機名，可隨意
$smtp_acc = "longbill.mail"; //Smtp認證的用戶名，
$smtp_pass = "longbill"; //Smtp認證的密碼，
$smtp_host = "smtp.163.com"; //SMTP服務器地址，
$from = "[email protected]"; //要與smtp信息對應 ,否則會失敗
/////////////Smtp信息完//////////////////////////////////
$headers = "Content-Type: text/plain; charset=/"gb2312/"/r/nContent-Transfer-Encoding: base64";
$lb="/r/n"; //linebreak
$hdr = explode($lb,$headers); //解析後的hdr
if($body)
{
$bdy = preg_replace("/^/./","..",explode($lb,$body));
}//解析後的Body
$smtp = array(
//1、EHLO，期待返回220或者250
array("EHLO ".$loc_host.$lb,"220,250","HELO error: "),
//2、發送Auth Login，期待返回334
array("AUTH LOGIN".$lb,"334","AUTH error:"),
//3、發送經過Base64編碼的用戶名，期待返回334
array(base64_encode($smtp_acc).$lb,"334","AUTHENTIFICATION error : "),
//4、發送經過Base64編碼的密碼，期待返回235
array(base64_encode($smtp_pass).$lb,"235","AUTHENTIFICATION error : "));
//5、發送Mail From，期待返回250
$smtp[] = array("MAIL FROM: <".$from.">".$lb,"250","MAIL FROM error: ");
//6、發送Rcpt To。期待返回250
$smtp[] = array("RCPT TO: <".$to.">".$lb,"250","RCPT TO error: ");
//7、發送DATA，期待返回354
$smtp[] = array("DATA".$lb,"354","DATA error: ");
//8.0、發送From
$smtp[] = array("From: ".$from.$lb,"","");
//8.2、發送To
$smtp[] = array("To: ".$to.$lb,"","");
//8.1、發送標題
$smtp[] = array("Subject: ".$subject.$lb,"","");
//8.3、發送其他Header內容
foreach($hdr as $h) {$smtp[] = array($h.$lb,"","");}
//8.4、發送一個空行，結束Header發送
$smtp[] = array($lb,"","");
//8.5、發送信件主體
if($bdy)
{
foreach($bdy as $b)
{
$smtp[] = array(base64_encode($b.$lb).$lb,"","");
}
}
//9、發送“.”表示信件結束，期待返回250
$smtp[] = array(".".$lb,"250","DATA(end)error: ");
//10、發送Quit，退出，期待返回221
$smtp[] = array("QUIT".$lb,"221","QUIT error: ");
//打開smtp服務器端口
$fp = @fsockopen($smtp_host, 25);
if (!$fp) echo "Error: Cannot conect to ".$smtp_host."
";
while($result = @fgets($fp, 1024))
{
if(substr($result,3,1) == " ") { break; }
}
$result_str="";
//發送smtp數組中的命令/數據
foreach($smtp as $req)
{
//發送信息
@fputs($fp, $req[0]);
//如果需要接收服務器返回信息，則
if($req[1])
{
//接收信息
while($result = @fgets($fp, 1024))
{
if(substr($result,3,1) == " ") { break; }
}
if (!strstr($req[1],substr($result,0,3)))
{
$result_str.=$req[2].$result."
";
}
}
}
//關閉連接
@fclose($fp);
if ($result_str==""){return "發送成功!!";}else {return $result_str;}
}

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