用之前记得先去163注册一个邮箱，然后打开SMTP服务，当然也可以使用QQ邮箱等，但配置信息得改。
如图所示，开启QQ邮箱SMTP服务：
话不多说，直接上代码
email.class.php 定义发送邮件的库
<?php class smtp { /* Public Variables */ var $smtp_port; //smtp_port 端口号 var $time_out; var $host_name; //服务器主机名 var $log_file; var $relay_host; //服务器主机地址 var $debug; var $auth; //验证 var $user; //服务器用户名 var $pass; //服务器密码 /* Private Variables */ var $sock; /* Constractor 构造方法*/ function smtp($relay_host = "", $smtp_port = 25, $auth = false, $user, $pass) { $this->debug = FALSE; $this->smtp_port = $smtp_port; $this->relay_host = $relay_host; $this->time_out = 30; //is used in fsockopen() # $this->auth = $auth; //auth $this->user = $user; $this->pass = $pass; # $this->host_name = "localhost"; //is used in HELO command // $this->host_name = "smtp.163.com"; //is used in HELO command $this->log_file = ""; $this->sock = FALSE; } /* Main Function */ function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = "") { $header = ""; $mail_from = $this->get_address($this->strip_comment($from)); $body = mb_ereg_replace("(^|(\r\n))(\\.)", "\\1.\\3", $body); $header .= "MIME-Version:1.0\r\n"; if ($mailtype == "HTML") { //邮件发送类型 //$header .= "Content-Type:text/html\r\n"; $header .= 'Content-type: text/html; charset=utf-8' . "\r\n"; } $header .= "To: " . $to . "\r\n"; if ($cc != "") { $header .= "Cc: " . $cc . "\r\n"; } $header .= "From: " . $from . "\r\n"; // $header .= "From: $from<".$from.">\r\n"; //这里只显示邮箱地址，不够人性化 $header .= "Subject: " . $subject . "\r\n"; $header .= $additional_headers; $header .= "Date: " . date("r") . "\r\n"; $header .= "X-Mailer:By (PHP/" . phpversion() . ")\r\n"; list($msec, $sec) = explode(" ", microtime()); $header .= "Message-ID: <" . date("YmdHis", $sec) . "." . ($msec * 1000000) . "." . $mail_from . ">\r\n"; $TO = explode(",", $this->strip_comment($to)); if ($cc != "") { $TO = array_merge($TO, explode(",", $this->strip_comment($cc))); //合并一个或多个数组 } if ($bcc != "") { $TO = array_merge($TO, explode(",", $this->strip_comment($bcc))); } $sent = TRUE; foreach ($TO as $rcpt_to) { $rcpt_to = $this->get_address($rcpt_to); if (!$this->smtp_sockopen($rcpt_to)) { $this->log_write("Error: Cannot send email to " . $rcpt_to . "\n"); $sent = FALSE; continue; } if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body)) { $this->log_write("E-mail has been sent to <" . $rcpt_to . ">\n"); } else { $this->log_write("Error: Cannot send email to <" . $rcpt_to . ">\n"); $sent = FALSE; } fclose($this->sock); $this->log_write("Disconnected from remote host\n"); } echo "<br>"; //echo $header; return $sent; } /* Private Functions */ function smtp_send($helo, $from, $to, $header, $body = "") { if (!$this->smtp_putcmd("HELO", $helo)) { return $this->smtp_error("sending HELO command"); } #auth if ($this->auth) { if (!$this->smtp_putcmd("AUTH LOGIN", base64_encode($this->user))) { return $this->smtp_error("sending HELO command"); } if (!$this->smtp_putcmd("", base64_encode($this->pass))) { return $this->smtp_error("sending HELO command"); } } # if (!$this->smtp_putcmd("MAIL", "FROM:<" . $from . ">")) { return $this->smtp_error("sending MAIL FROM command"); } if (!$this->smtp_putcmd("RCPT", "TO:<" . $to . ">")) { return $this->smtp_error("sending RCPT TO command"); } if (!$this->smtp_putcmd("DATA")) { return $this->smtp_error("sending DATA command"); } if (!$this->smtp_message($header, $body)) { return $this->smtp_error("sending message"); } if (!$this->smtp_eom()) { return $this->smtp_error("sending <CR><LF>.<CR><LF> [EOM]"); } if (!$this->smtp_putcmd("QUIT")) { return $this->smtp_error("sending QUIT command"); } return TRUE; } function smtp_sockopen($address) { if ($this->relay_host == "") { return $this->smtp_sockopen_mx($address); } else { return $this->smtp_sockopen_relay(); } } function smtp_sockopen_relay() { $this->log_write("Trying to " . $this->relay_host . ":" . $this->smtp_port . "\n"); $this->sock = @fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out); if (!($this->sock && $this->smtp_ok())) { $this->log_write("Error: Cannot connenct to relay host " . $this->relay_host . "\n"); $this->log_write("Error: " . $errstr . " (" . $errno . ")\n"); return FALSE; } $this->log_write("Connected to relay host " . $this->relay_host . "\n"); return TRUE; ; } function smtp_sockopen_mx($address) { $domain = ereg_replace("^.+@([^@]+)$", "\\1", $address); if (!@getmxrr($domain, $MXHOSTS)) { $this->log_write("Error: Cannot resolve MX \"" . $domain . "\"\n"); return FALSE; } foreach ($MXHOSTS as $host) { $this->log_write("Trying to " . $host . ":" . $this->smtp_port . "\n"); $this->sock = @fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out); if (!($this->sock && $this->smtp_ok())) { $this->log_write("Warning: Cannot connect to mx host " . $host . "\n"); $this->log_write("Error: " . $errstr . " (" . $errno . ")\n"); continue; } $this->log_write("Connected to mx host " . $host . "\n"); return TRUE; } $this->log_write("Error: Cannot connect to any mx hosts (" . implode(", ", $MXHOSTS) . ")\n"); return FALSE; } function smtp_message($header, $body) { fputs($this->sock, $header . "\r\n" . $body); $this->smtp_debug("> " . str_replace("\r\n", "\n" . "> ", $header . "\n> " . $body . "\n> ")); return TRUE; } function smtp_eom() { fputs($this->sock, "\r\n.\r\n"); $this->smtp_debug(". [EOM]\n"); return $this->smtp_ok(); } function smtp_ok() { $response = str_replace("\r\n", "", fgets($this->sock, 512)); $this->smtp_debug($response . "\n"); if (!mb_ereg("^[23]", $response)) { fputs($this->sock, "QUIT\r\n"); fgets($this->sock, 512); $this->log_write("Error: Remote host returned \"" . $response . "\"\n"); return FALSE; } return TRUE; } function smtp_putcmd($cmd, $arg = "") { if ($arg != "") { if ($cmd == "") $cmd = $arg; else $cmd = $cmd . " " . $arg; } fputs($this->sock, $cmd . "\r\n"); $this->smtp_debug("> " . $cmd . "\n"); return $this->smtp_ok(); } function smtp_error($string) { $this->log_write("Error: Error occurred while " . $string . ".\n"); return FALSE; } function log_write($message) { $this->smtp_debug($message); if ($this->log_file == "") { return TRUE; } $message = date("M d H:i:s ") . get_current_user() . "[" . getmypid() . "]: " . $message; if (!@file_exists($this->log_file) || !($fp = @fopen($this->log_file, "a"))) { $this->smtp_debug("Warning: Cannot open log file \"" . $this->log_file . "\"\n"); return FALSE; } flock($fp, LOCK_EX); fputs($fp, $message); fclose($fp); return TRUE; } function strip_comment($address) { $comment = "\\([^()]*\\)"; while (mb_ereg($comment, $address)) { $address = mb_ereg_replace($comment, "", $address); } return $address; } function get_address($address) { $address = mb_ereg_replace("([ \t\r\n])+", "", $address); $address = mb_ereg_replace("^.*<(.+)>.*$", "\\1", $address); return $address; } function smtp_debug($message) { if ($this->debug) { echo $message . "<br>"; } } function get_attach_type($image_tag) // { $filedata = array(); $img_file_con = fopen($image_tag, "r"); unset($image_data); while ($tem_buffer = AddSlashes(fread($img_file_con, filesize($image_tag)))) $image_data .= $tem_buffer; fclose($img_file_con); $filedata['context'] = $image_data; $filedata['filename'] = basename($image_tag); $extension = substr($image_tag, strrpos($image_tag, "."), strlen($image_tag) - strrpos($image_tag, ".")); switch ($extension) { case ".gif": $filedata['type'] = "image/gif"; break; case ".gz": $filedata['type'] = "application/x-gzip"; break; case ".htm": $filedata['type'] = "text/html"; break; case ".html": $filedata['type'] = "text/html"; break; case ".jpg": $filedata['type'] = "image/jpeg"; break; case ".tar": $filedata['type'] = "application/x-tar"; break; case ".txt": $filedata['type'] = "text/plain"; break; case ".zip": $filedata['type'] = "application/zip"; break; default: $filedata['type'] = "application/octet-stream"; break; } return $filedata; } } ?>
index.php 发送邮件的具体实现