php发送email

1.phpmailer,很好用，无论原生还是放到框架下，都没问题

 <?php
 header("content-type:text/html;charset=utf-8");
 include("class.phpmailer.php");
 include("class.smtp.php");
 $mail = new PHPMailer();
 $mail->IsSMTP(); // send via SMTP
 $mail->Host = "smtp.163.com"; // SMTP servers
 $mail->SMTPAuth = true; // turn on SMTP authentication
 $mail->Username = "*********"; // SMTP username 注意：普通邮件认证不需要加 @域名
 $mail->Password = "*****"; // SMTP password
 $mail->From = "******@163.com"; // 发件人邮箱
 $mail->FromName = "zph"; // 发件人
 $mail->CharSet = "utf-8"; // 这里指定字符集！
 $mail->Encoding = "base64";
 $mail->AddAddress("******@163.com","toyou"); // 收件人邮箱和姓名
 $mail->AddReplyTo("******@163.com","wo");
 //$mail->WordWrap = 50; // set word wrap 换行字数
 //$mail->AddAttachment("/var/tmp/file.tar.gz"); // attachment 附件
 //$mail->AddAttachment("/tmp/image.jpg", "new.jpg");
 $mail->IsHTML(true); // send as HTML
 // 邮件主题
 $subject="测试";
 $mail->Subject = $subject;
 // 邮件内容
 $mail->Body = "
 <p>点击激活</p>
 <a href='#'>点击激活</a>
 ";
 $mail->AltBody ="text/html";
 if(!$mail->Send())
 {
 echo "邮件发送有误 <p>";
 echo "邮件错误信息: " . $mail->ErrorInfo;
 exit;
 }
 else {
 echo "邮件发送成功!<br />";
 }

2.当使用PHP原生mail()函数的时候，需要安装sendmail，linux一般已经安装sendmail，可以直接使用mail(),如果是windows需要先安装。

3.当使用ci框架的时候，如下

 public function sendemail()
 {
     $config = array('protocol'=>'smtp',
         'smtp_host' => 'smtp.163.com',
         'smtp_user' => 'yourname',
         'smtp_pass' => '*****',
         'smtp_port' => '25',
         '_smtp_auth' => TRUE,
         'wordwrap' => TRUE,
         'charset' => 'iso-8859-1'

     );
     $this->load->library('email', $config);
     $this->email->from('[email protected]', 'Your Name');
     $this->email->to('[email protected]');
     $this->email->subject('Email Test');
     $this->email->message('Testing the email class.');
     $this->email->send();
 }