这篇文章主要介绍了php发送邮件的示例，并可以发送带附件的邮件，大家参考使用吧 

emailclass.php  代码如下: <?  class CMailFile {   var $subject;  var $addr_to;  var $text_body;  var $text_encoded;  var $mime_headers;  var $mime_boundary = "--==================_846811060==_";  var $smtp_headers;   function CMailFile($subject,$to,$from,$msg,$filename,$downfilename,$mimetype = "application/octet-stream",$mime_filename = false) {  $this->subject = $subject;  $this->addr_to = $to;  $this->smtp_headers = $this->write_smtpheaders($from);  $this->text_body = $this->write_body($msg);  $this->text_encoded = $this->attach_file($filename,$downfilename,$mimetype,$mime_filename);  $this->mime_headers = $this->write_mimeheaders($filename, $mime_filename);  }   function attach_file($filename,$downfilename,$mimetype,$mime_filename) {  $encoded = $this->encode_file($filename);  if ($mime_filename) $filename = $mime_filename;  $out = "--" . $this->mime_boundary . "n";  $out = $out . "Content-type: " . $mimetype . "; name="$filename";n";  $out = $out . "Content-Transfer-Encoding: base64n";  $out = $out . "Content-disposition: attachment; filename="$downfilename"nn";  $out = $out . $encoded . "n";  $out = $out . "--" . $this->mime_boundary . "--" . "n";  return $out;  }   function encode_file($sourcefile) {  if (is_readable($sourcefile)) {  $fd = fopen($sourcefile, "r");  $contents = fread($fd, filesize($sourcefile));  $encoded = chunk_split(base64_encode($contents));  fclose($fd);  }  return $encoded;  }   function sendfile() {  $headers = $this->smtp_headers . $this->mime_headers;  $message = $this->text_body . $this->text_encoded;  mail($this->addr_to,$this->subject,$message,$headers);  } www.jbxue.com   function write_body($msgtext) {  $out = "--" . $this->mime_boundary . "n";  $out = $out . "Content-Type: text/plain; charset="us-ascii"nn";  $out = $out . $msgtext . "n";  return $out;  }   function write_mimeheaders($filename, $mime_filename) {  if ($mime_filename) $filename = $mime_filename;  $out = "MIME-version: 1.0n";  $out = $out . "Content-type: multipart/mixed; ";  $out = $out . "boundary="$this->mime_boundary"n";  $out = $out . "Content-transfer-encoding: 7BITn";  $out = $out . "X-attachments: $filename;nn";  return $out;  }   function write_smtpheaders($addr_from) {  $out = "From: $addr_fromn";  $out = $out . "Reply-To: $addr_fromn";  $out = $out . "X-Mailer: PHP3n";  $out = $out . "X-Sender: $addr_fromn";  return $out;  }  }   /*用法 - 例如:mimetype 为 "image/gif"  $mailfile = new CMailFile($subject,$sendto,$replyto,$message,$filename,$mimetype);  $mailfile->sendfile();   $subject -- 主题  $sendto -- 收信人地址  $replyto -- 回复地址  $message -- 信件内容  $filename -- 附件文件名  $downfilename -- 下載的文件名  $mimetype -- mime类型  */  ?>       演示示例   代码如下: <?php  require_once('emailclass.php');   //发送邮件   //主題  $subject = "test send email";   //收件人  $sendto = '[email protected]';   //發件人  $replyto = '[email protected]';   //內容 www.jbxue.com $message = "test send email content";   //附件  $filename = 'test.jpg';   //附件類別  $mimetype = "image/jpeg";   $mailfile = new CMailFile($subject,$sendto,$replyto,$message,$filename,$excelname,$mimetype);  $mailfile->sendfile();  ?>