Answers:
使用PHP的mail()功能是可能的。请记住，邮件功能在本地服务器上不起作用。
<?php
$to = 'nobody@example.com';
$subject = 'the subject';
$message = 'hello';
$headers = 'From: webmaster@example.com' . "\r\n" .
'Reply-To: webmaster@example.com' . "\r\n" .
'X-Mailer: PHP/' . phpversion();
mail($to, $subject, $message, $headers);
?>
参考：
您也可以在https://github.com/PHPMailer/PHPMailer使用PHPMailer类。
它允许您透明地使用邮件功能或使用smtp服务器。它还处理基于HTML的电子邮件和附件，因此您不必编写自己的实现。
该类是稳定的，它被Drupal，SugarCRM，Yii和Joomla等许多其他项目使用。
这是上一页的示例：
<?php
require 'PHPMailerAutoload.php';
$mail = new PHPMailer;
$mail->isSMTP(); // Set mailer to use SMTP
$mail->Host = 'smtp1.example.com;smtp2.example.com'; // Specify main and backup SMTP servers
$mail->SMTPAuth = true; // Enable SMTP authentication
$mail->Username = 'user@example.com'; // SMTP username
$mail->Password = 'secret'; // SMTP password
$mail->SMTPSecure = 'tls'; // Enable encryption, 'ssl' also accepted
$mail->From = 'from@example.com';
$mail->FromName = 'Mailer';
$mail->addAddress('joe@example.net', 'Joe User'); // Add a recipient
$mail->addAddress('ellen@example.com'); // Name is optional
$mail->addReplyTo('info@example.com', 'Information');
$mail->addCC('cc@example.com');
$mail->addBCC('bcc@example.com');
$mail->WordWrap = 50; // Set word wrap to 50 characters
$mail->addAttachment('/var/tmp/file.tar.gz'); // Add attachments
$mail->addAttachment('/tmp/image.jpg', 'new.jpg'); // Optional name
$mail->isHTML(true); // Set email format to HTML
$mail->Subject = 'Here is the subject';
$mail->Body = 'This is the HTML message body <b>in bold!</b>';
$mail->AltBody = 'This is the body in plain text for non-HTML mail clients';
if(!$mail->send()) {
echo 'Message could not be sent.';
echo 'Mailer Error: ' . $mail->ErrorInfo;
} else {
echo 'Message has been sent';
}use PHPMailer\PHPMailer\PHPMailer; use PHPMailer\PHPMailer\Exception; require_once('src/PHPMailer.php'); require_once('src/Exception.php');
如果您对html格式的电子邮件感兴趣，请确保传递Content-type: text/html;标题。例：
// multiple recipients
$to = 'aidan@example.com' . ', '; // note the comma
$to .= 'wez@example.com';
// subject
$subject = 'Birthday Reminders for August';
// message
$message = '
<html>
<head>
<title>Birthday Reminders for August</title>
</head>
<body>
<p>Here are the birthdays upcoming in August!</p>
<table>
<tr>
<th>Person</th><th>Day</th><th>Month</th><th>Year</th>
</tr>
<tr>
<td>Joe</td><td>3rd</td><td>August</td><td>1970</td>
</tr>
<tr>
<td>Sally</td><td>17th</td><td>August</td><td>1973</td>
</tr>
</table>
</body>
</html>
';
// To send HTML mail, the Content-type header must be set
$headers = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
// Additional headers
$headers .= 'To: Mary <mary@example.com>, Kelly <kelly@example.com>' . "\r\n";
$headers .= 'From: Birthday Reminder <birthday@example.com>' . "\r\n";
$headers .= 'Cc: birthdayarchive@example.com' . "\r\n";
$headers .= 'Bcc: birthdaycheck@example.com' . "\r\n";
// Mail it
mail($to, $subject, $message, $headers);有关更多详细信息，请检查php 邮件功能。
同时查看PEAR邮件包Pear Mail Page
它似乎比内置的标准mail（）函数更健壮（如果标准函数不够用的话）。
这是此页面的摘录，显示了如何使用它。 PEAR Mail send（）的用法
<?php
include('Mail.php');
$recipients = 'joe@example.com';
$headers['From'] = 'richard@example.com';
$headers['To'] = 'joe@example.com';
$headers['Subject'] = 'Test message';
$body = 'Test message';
$smtpinfo["host"] = "smtp.server.com";
$smtpinfo["port"] = "25";
$smtpinfo["auth"] = true;
$smtpinfo["username"] = "smtp_user";
$smtpinfo["password"] = "smtp_password";
// Create the mail object using the Mail::factory method
$mail_object =& Mail::factory("smtp", $smtpinfo);
$mail_object->send($recipients, $headers, $body);
?> Mail.php在我的示例中引用的文件是Pear Mail软件包的一部分。如果您下载并安装Pear Mail软件包，则可以包括Mail.php。如果您点击上面的“ Pear Mail Page”链接，则会有一个带有说明的Download链接。
对于大多数项目，这些天我都使用Swift邮件程序。这是一种非常灵活且优雅的面向对象的电子邮件发送方法，由向我们提供了流行的Symfony框架和Twig模板引擎的同一个人创建。
require 'mail/swift_required.php';
$message = Swift_Message::newInstance()
// The subject of your email
->setSubject('Jane Doe sends you a message')
// The from address(es)
->setFrom(array('jane.doe@gmail.com' => 'Jane Doe'))
// The to address(es)
->setTo(array('frank.stevens@gmail.com' => 'Frank Stevens'))
// Here, you put the content of your email
->setBody('<h3>New message</h3><p>Here goes the rest of my message</p>', 'text/html');
if (Swift_Mailer::newInstance(Swift_MailTransport::newInstance())->send($message)) {
echo json_encode([
"status" => "OK",
"message" => 'Your message has been sent!'
], JSON_PRETTY_PRINT);
} else {
echo json_encode([
"status" => "error",
"message" => 'Oops! Something went wrong!'
], JSON_PRETTY_PRINT);
}有关如何使用Swift邮件程序的更多信息，请参见官方文档。
Swift_MailTransport的是指向文档的链接Swift_SendmailTransport。这是否意味着您所指的是较早版本的swift mailer，或者是拼写错误，还是我误会了某些东西？我需要安装较早版本的swift-mailer，因为我的服务器上没有php7。因此，我需要知道当前版本的文档是否与软件包的旧版本一起使用。谢谢。
这是使用邮件功能发送纯文本电子邮件的非常基本的方法。
<?php
$to = 'SomeOtherEmailAddress@Domain.com';
$subject = 'This is subject';
$message = 'This is body of email';
$from = "From: FirstName LastName <SomeEmailAddress@Domain.com>";
mail($to,$subject,$message,$from);完整的代码示例
尝试一次。
<?php
// Multiple recipients
$to = 'johny@example.com, sally@example.com'; // note the comma
// Subject
$subject = 'Birthday Reminders for August';
// Message
$message = '
<html>
<head>
<title>Birthday Reminders for August</title>
</head>
<body>
<p>Here are the birthdays upcoming in August!</p>
<table>
<tr>
<th>Person</th><th>Day</th><th>Month</th><th>Year</th>
</tr>
<tr>
<td>Johny</td><td>10th</td><td>August</td><td>1970</td>
</tr>
<tr>
<td>Sally</td><td>17th</td><td>August</td><td>1973</td>
</tr>
</table>
</body>
</html>
';
// To send HTML mail, the Content-type header must be set
$headers[] = 'MIME-Version: 1.0';
$headers[] = 'Content-type: text/html; charset=iso-8859-1';
// Additional headers
$headers[] = 'To: Mary <mary@example.com>, Kelly <kelly@example.com>';
$headers[] = 'From: Birthday Reminder <birthday@example.com>';
$headers[] = 'Cc: birthdayarchive@example.com';
$headers[] = 'Bcc: birthdaycheck@example.com';
// Mail it
mail($to, $subject, $message, implode("\r\n", $headers));
?>对于未来的读者：如果其他答案不起作用（例如我），请尝试以下操作：
1.）下载PHPMailer，打开zip文件并将文件夹解压缩到您的项目目录。
3.）将提取的目录重命名为PHPMailer，并在php脚本中写入以下代码（该脚本必须位于PHPMailer文件夹之外）
<?php
// PHPMailer classes into the global namespace
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;
// Base files
require 'PHPMailer/src/Exception.php';
require 'PHPMailer/src/PHPMailer.php';
require 'PHPMailer/src/SMTP.php';
// create object of PHPMailer class with boolean parameter which sets/unsets exception.
$mail = new PHPMailer(true);
try {
$mail->isSMTP(); // using SMTP protocol
$mail->Host = 'smtp.gmail.com'; // SMTP host as gmail
$mail->SMTPAuth = true; // enable smtp authentication
$mail->Username = 'sender@gmail.com'; // sender gmail host
$mail->Password = 'password'; // sender gmail host password
$mail->SMTPSecure = 'tls'; // for encrypted connection
$mail->Port = 587; // port for SMTP
$mail->setFrom('sender@gmail.com', "Sender"); // sender's email and name
$mail->addAddress('receiver@gmail.com', "Receiver"); // receiver's email and name
$mail->Subject = 'Test subject';
$mail->Body = 'Test body';
$mail->send();
echo 'Message has been sent';
} catch (Exception $e) { // handle error.
echo 'Message could not be sent. Mailer Error: ', $mail->ErrorInfo;
}
?>本机PHP函数mail()对我不起作用。它发出消息：
503尝试发送到非本地电子邮件地址时，此邮件服务器需要身份验证
所以，我通常使用PHPMailer包
我已经从GitHub下载了5.2.23版本。
我刚刚选择了2个文件，并将它们放在我的源PHP根目录中
class.phpmailer.php
class.smtp.php
在PHP中，需要添加文件
require_once('class.smtp.php');
require_once('class.phpmailer.php');在此之后，它只是代码：
require_once('class.smtp.php');
require_once('class.phpmailer.php');
...
//----------------------------------------------
// Send an e-mail. Returns true if successful
//
// $to - destination
// $nameto - destination name
// $subject - e-mail subject
// $message - HTML e-mail body
// altmess - text alternative for HTML.
//----------------------------------------------
function sendmail($to,$nameto,$subject,$message,$altmess) {
$from = "yourcontact@yourdomain.com";
$namefrom = "yourname";
$mail = new PHPMailer();
$mail->CharSet = 'UTF-8';
$mail->isSMTP(); // by SMTP
$mail->SMTPAuth = true; // user and password
$mail->Host = "localhost";
$mail->Port = 25;
$mail->Username = $from;
$mail->Password = "yourpassword";
$mail->SMTPSecure = ""; // options: 'ssl', 'tls' , ''
$mail->setFrom($from,$namefrom); // From (origin)
$mail->addCC($from,$namefrom); // There is also addBCC
$mail->Subject = $subject;
$mail->AltBody = $altmess;
$mail->Body = $message;
$mail->isHTML(); // Set HTML type
//$mail->addAttachment("attachment");
$mail->addAddress($to, $nameto);
return $mail->send();
}它像一个魅力
use PHPMailer\PHPMailer\PHPMailer; use PHPMailer\PHPMailer\Exception; require_once('src/PHPMailer.php'); require_once('src/Exception.php');
从PHP发送电子邮件的核心方法是使用其内置mail()函数，但是有一些现成的SDK可以简化集成：
PS我受雇于Pepipost。
您可以使用邮件网络服务，例如邮戳，Sendgrid等。
Sendgrid，Postmark，Amazon SES和其他电子邮件/ SMTP API提供程序？
编辑：我现在只使用Google Gmail API。由于严格的过滤条件，我无法向我的雇主组织发送提醒电子邮件。但是，只要您不向他人发送垃圾邮件，Gmail就可以正常工作。
使用此脚本发送电子邮件
<h2>Test Mail</h2>
<?php
if (!isset($_POST["submit"]))
{
?>
<form method="post" action="<?php echo $_SERVER["PHP_SELF"];?>">
From: <input type="text" name="from"><br>
Subject: <input type="text" name="subject"><br>
Message: <textarea rows="10" cols="40" name="message"></textarea><br>
<input type="submit" name="submit" value="Click To send mail">
</form>
<?php
}
else
{
if (isset($_POST["from"]))
{
$from = $_POST["from"]; // sender
$subject = $_POST["subject"];
$message = $_POST["message"];
$message = wordwrap($message, 70);
mail("Test@example.com",$subject,$message,"From: $from\n");
echo "Thank you for sending an email";
}
}
?>按下“发送电子邮件”按钮后，电子邮件将发送到Test@example.com
<?php
include "db_conn.php";//connection file
require "PHPMailerAutoload.php";// it will be in PHPMailer
require "class.smtp.php";// it will be in PHPMailer
require "class.phpmailer.php";// it will be in PHPMailer
$response = array();
$params = json_decode(file_get_contents("php://input"));
if(!empty($params->email_id)){
$email_id = $params->email_id;
$flag=false;
echo "something";
if(!filter_var($email_id, FILTER_VALIDATE_EMAIL))
{
$response['ERROR']='EMAIL address format error';
echo json_encode($response,JSON_UNESCAPED_SLASHES);
return;
}
$sql="SELECT * from sales where email_id ='$email_id' ";
$result = mysqli_query($conn,$sql);
$count = mysqli_num_rows($result);
$to = "demo@gmail.com";
$subject = "DEMO Subject";
$messageBody ="demo message .";
if($count ==0){
$response["valid"] = false;
$response["message"] = "User is not registered yet";
echo json_encode($response);
return;
}
else {
$mail = new PHPMailer();
$mail->IsSMTP();
$mail->SMTPAuth = true; // authentication enabled
$mail->IsHTML(true);
$mail->SMTPSecure = 'ssl';//turn on to send html email
// $mail->Host = "ssl://smtp.zoho.com";
$mail->Host = "p3plcpnl0749.prod.phx3.secureserver.net";//you can use gmail
$mail->Port = 465;
$mail->Username = "demousername@example.com";
$mail->Password = "demopassword";
$mail->SetFrom("demousername@example.com", "Any demo alert");
$mail->Subject = $subject;
$mail->Body = $messageBody;
$mail->AddAddress($to);
echo "yes";
if(!$mail->send()) {
echo "Mailer Error: " . $mail->ErrorInfo;
}
else {
echo "Message has been sent successfully";
}
}
}
else{
$response["valid"] = false;
$response["message"] = "Required field(s) missing";
echo json_encode($response);
}
?>上面的代码为我工作。