使用php通过Socket进行发信源码，支持发信认证

使用php直接打开socket端口进行发信的小程序特点是使用smtp认证，能够更好的使用满足一般网友建站需要。
整个源码附在本文中，同样内容可到下列地址下载。转载请注明出处。
http://www.knowsky.com/download/phpsendmail.rar

/******************************************//*          Php webmail sender            *//*           www.ebugs.org                *//* Copyright 富翁 in im286.com 2005.03.07 *//*           转载请注明出处               *//******************************************/
//使用前请首先按照提示进行配置发信认证的用户名、密码以及smtp服务器地址、发件人信箱等。//注意将#替换成#，落伍(www.im286.com）负翁版权所有，可随意使用，但保留版权信息
//例子echo send_mail('fuweng#im286.com','发信标题','发信内容');
function send_mail($to, $subject = 'No subject', $body) {        $loc_host = "im286";            //发信计算机名，可随意        $smtp_acc = "fuweng#im286.com"; //Smtp认证的用户名，类似fuweng@im286.com，或者fuweng        $smtp_pass="password";          //Smtp认证的密码，一般等同pop3密码        $smtp_host="smtp.im286.com";    //SMTP服务器地址，类似 smtp.tom.com        $from="fuweng#im286.com";       //发信人Email地址，你的发信信箱地址    $headers = "Content-Type: text/plain; charset="gb2312"
Content-Transfer-Encoding: base64";    $lb="
";                    //linebreak        $hdr = explode($lb,$headers);     //解析后的hdr    if($body) {$bdy = preg_replace("/^./","..",explode($lb,$body));}//解析后的Body
        $smtp = array(                //1、EHLO，期待返回220或者250                array("EHLO ".$loc_host.$lb,"220,250","HELO error: "),                //2、发送Auth Login，期待返回334                array("AUTH LOGIN".$lb,"334","AUTH error:"),                //3、发送经过Base64编码的用户名，期待返回334                array(base64_encode($smtp_acc).$lb,"334","AUTHENTIFICATION error : "),                //4、发送经过Base64编码的密码，期待返回235                array(base64_encode($smtp_pass).$lb,"235","AUTHENTIFICATION error : "));        //5、发送Mail From，期待返回250        $smtp[] = array("MAIL FROM: <".$from.">".$lb,"250","MAIL FROM error: ");        //6、发送Rcpt To。期待返回250        $smtp[] = array("RCPT TO: <".$to.">".$lb,"250","RCPT TO error: ");        //7、发送DATA，期待返回354        $smtp[] = array("DATA".$lb,"354","DATA error: ");        //8.0、发送From        $smtp[] = array("From: ".$from.$lb,"","");        //8.2、发送To        $smtp[] = array("To: ".$to.$lb,"","");        //8.1、发送标题        $smtp[] = array("Subject: ".$subject.$lb,"","");        //8.3、发送其他Header内容        foreach($hdr as $h) {$smtp[] = array($h.$lb,"","");}        //8.4、发送一个空行，结束Header发送        $smtp[] = array($lb,"","");        //8.5、发送信件主体        if($bdy) {foreach($bdy as $b) {$smtp[] = array(base64_encode($b.$lb).$lb,"","");}}        //9、发送“.”表示信件结束，期待返回250        $smtp[] = array(".".$lb,"250","DATA(end)error: ");        //10、发送Quit，退出，期待返回221        $smtp[] = array("QUIT".$lb,"221","QUIT error: ");
        //打开smtp服务器端口        $fp = @fsockopen($smtp_host, 25);        if (!$fp) echo "Error: Cannot conect to ".$smtp_host."";        while($result = @fgets($fp, 1024)){if(substr($result,3,1) == " ") { break; }}        $result_str="";        //发送smtp数组中的命令/数据        foreach($smtp as $req){                //发送信息                @fputs($fp, $req[0]);                //如果需要接收服务器返回信息，则                if($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].$result."";                        }                }        }        //关闭连接        @fclose($fp);        return $result_str;}?> 


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