使用PHPMailer通过邮件发送用户密码的步骤:

步骤1:首先，从GitHub下载PHPMailer软件包

您只需下载PHPMailer源文件并手动包含所需的文件。

您可以从PHPMailer主页[1]下载带有源代码的ZIP文件， 点击“克隆或下载”绿色按钮(右侧)，然后选择“下载ZIP”。 在要保存源文件的目录中解压缩包。

[1] https://github.com/PHPMailer/PHPMailer

第二步:打开“(来自Gmail地址)谷歌帐户”，执行以下步骤:

禁用谷歌帐号的双因素密码验证。 打开Less Security。 允许第三方应用程序。

步骤3:尝试使用下面的代码(注意:在这里，我只提供了使用PHP和MySQL通过电子邮件发送用户密码的功能代码)

    <?php 
    session_start();

    use PHPMailer\PHPMailer\PHPMailer;  //add use in starting of the code

    $db = mysqli_connect('localhost', 'root', '', '[Enter your Database Name]'); // connect to database

    if (isset($_POST['forgot_btn'])) {
        forgotpassword();
    }

    function forgotpassword(){
    global $db;
     
        $user_id = $_POST['user_id'];
        $result = mysqli_query($db,"SELECT * FROM users where user_id='$user_id'");
        $row = mysqli_fetch_assoc($result);
        $fetch_user_id=$row['user_id'];
        $name=$row['name'];
        $email_id=$row['email_id'];
        $password=$row['password'];
        if($user_id==$fetch_user_id) {
       require '../PHPMailer/vendor/autoload.php';  //Please correctly mention the PHPMailer installed directory (Don't follow my directory)

    $mail = new PHPMailer(TRUE);
    try{
       $mail->setFrom('[Enter your From Email_Address]', '[Enter Sender Name]');
       $mail->addAddress($email_id, $name);  //[To Email Address and Name]
       $mail->Subject = 'Regarding Forgot Password';
       $mail->Body = 'Hi '.$name.',Your Login Password is:'.$password.'';
       $mail->isSMTP();
       $mail->Host = 'smtp.gmail.com';
       $mail->SMTPAuth = TRUE;
       $mail->SMTPSecure = 'tls';
       $mail->Username = '[Enter your From Email_Address]';
       $mail->Password = '[Enter your From Email_Address -> Password]';
       $mail->Port = 587;
       
       if($mail->send())
       {
          echo "<script>alert('Password Sent Successfully');</script>"; 
       }
       else
       {
         echo "<script>alert('Please Check Your Internet Connection or From Email Address/Password or Wrong To Email Address');</script>";   
       }
    }
    catch (Exception $e)
    {
       echo "<script>alert('Please Check Your Internet Connection or From Email Address/Password or Wrong To Email Address');</script>";
    }
        }
    }

    ?>

更多信息请参考这些文档[1]:

[1]. https://alexwebdevelop.com/phpmailer-tutorial/

对于大多数项目，我现在使用Swift mailer。这是一种非常灵活和优雅的面向对象的发送电子邮件的方法，它是由给我们提供流行的Symfony框架和Twig模板引擎的同一个人创建的。

基本用法:

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 mailer的更多信息，请参阅官方文档。

你也可以在https://github.com/PHPMailer/PHPMailer上使用PHPMailer类。

它允许您使用邮件功能或透明地使用smtp服务器。它还可以处理基于HTML的电子邮件和附件，因此您不必编写自己的实现。

这个类是稳定的，它被许多其他项目使用，如Drupal、SugarCRM、Yii和Joomla!

下面是上面页面的一个例子:

<?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';
}

这是非常基本的方法发送纯文本电子邮件使用邮件功能。

<?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);

纯文本电子邮件

<?php

$to       = 'name@example.com';
$subject  = 'Your email subject here';
$message  = 'Your message here';

// Carriage return type (RFC).
$eol = "\r\n";

$headers  = "Reply-To: Name <name@example.com>".$eol;
$headers .= "Return-Path: Name <name@example.com>".$eol;
$headers .= "From: Name <name@example.com>".$eol;
$headers .= "Organization: Hostinger".$eol;
$headers .= "MIME-Version: 1.0".$eol;
$headers .= "Content-type: text/plain; charset=utf-8".$eol;
$headers .= "X-Priority: 3".$eol;
$headers .= "X-Mailer: PHP".phpversion().$eol;


mail($to, $subject, $message, $headers);

使用html发送电子邮件

<?php

$to       = 'name@example.com';
$subject  = 'Your email subject here';
$message  = '
<html>
<head>
<title>Your '.$to.' as your contact email address</title>
</head>
<body>
<p>Hi, there!</p>
<p>It is a long established fact that '.$to.' reader will be distracted by the readable content of a page when looking at its layout</p>
</body>
</html>
';

// Carriage return type (RFC).
$eol = "\r\n";

$headers  = "Reply-To: Name <name@example.com>".$eol;
$headers .= "Return-Path: Name <name@example.com>".$eol;
$headers .= "From: Name <name@example.com>".$eol;
$headers .= "Organization: Hostinger".$eol;
$headers .= "MIME-Version: 1.0".$eol;
$headers .= "Content-type: text/html; charset=iso-8859-1".$eol;
$headers .= "X-Priority: 3".$eol;
$headers .= "X-Mailer: PHP".phpversion().$eol;


mail($to, $subject, $message, $headers);

邮件附附件

<?php

$url = "https://c.xkcd.com/random/comic/";
$ch  = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
// Must be set to true so that PHP follows any "Location:" header.
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
// $a will contain all headers.
$a = curl_exec($ch);
// This is what you need, it will return you the last effective URL.
$url = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);

$str  = file_get_contents($url.'info.0.json');
$json = json_decode($str, true);

// Get file info.
$imageTitle = $json['title'];

// Image url.
$imageUrl = $json['img'];

// Image alt text.
$imageAlt = $json['alt'];

// Image file.
$imageFile = file_get_contents($imageUrl);

$tokens = explode('/', $imageUrl);

// File name.
$fileName = $tokens[(count($tokens) - 1)];

// File extension.
$ext = explode(".", $fileName);

// File type.
$fileType = $ext[1];

// File size.
$header = get_headers($imageUrl, true);

$fileSize = $header['Content-Length'];




$to      = 'name@example.com';
$subject = "Enjoy reading today's most interesting XKCD comics";
$message = '
<html>
<head>
<title>Your email '.$to.' is listed in our XKCD comics subscribers.</title>
</head>
<body> 
    <h1>'.$imageTitle.'</h1>
    <img src='.$imageUrl.' alt='.$imageAlt.'>
</body>
</html>';

// File.
$content = chunk_split(base64_encode($imageFile));

// A random hash will be necessary to send mixed content.
$semiRand     = md5(time());
$mimeBoundary = '==Multipart_Boundary_x{$semiRand}x';

// Carriage return type (RFC).
$eol = "\r\n";

$headers  = 'Reply-To: Name <name@example.com>'.$eol;
$headers .= 'Return-Path: Name <name@example.com>'.$eol;
$headers .= 'From: Name <name@example.com>'.$eol;
$headers .= 'Organization: Hostinger'.$eol;
$headers  = 'MIME-Version: 1.0'.$eol;
$headers .= "Content-Type: multipart/mixed; boundary=\"{$mimeBoundary}\"".$eol;
$headers .= 'Content-Transfer-Encoding: 7bit'.$eol;
$headers .= 'X-Priority: 3'.$eol;
$headers .= 'X-Mailer: PHP'.phpversion().$eol;

// Message.
$body  = '--'.$mimeBoundary.$eol;
$body .= "Content-Type: text/html; charset=\"UTF-8\"".$eol;
$body .= 'Content-Transfer-Encoding: 7bit'.$eol;
$body .= $message.$eol;

// Attachment.
$body .= '--'.$mimeBoundary.$eol;
$body .= "Content-Type:{$fileType}; name=\"{$fileName}\"".$eol;
$body .= 'Content-Transfer-Encoding: base64'.$eol;
$body .= "Content-disposition: attachment; filename=\"{$fileName}\"".$eol;
$body .= 'X-Attachment-Id: '.rand(1000, 99999).$eol;
$body .= $content.$eol;
$body .= '--'.$mimeBoundary.'--';

$success = mail($to, $subject, $body, $headers);

if ($success === false) {
    echo '<h3>Failure</h3>';
    echo '<p>Failed to send email to '.$to.'</p>';
} else {
    echo '<p>Your email has been sent to '.$to.' successfully.</p>';
}

电子邮件验证

<?php

function verifyLink() {
    require 'db-connection.php';

    $mysqli->select_db($dbname);

    $sql = "SELECT `email`, `hash` FROM `Users` ORDER BY `active`";

    $result = $mysqli->query($sql);

    $row = $result->fetch_row();
    
    if ($_SERVER['HTTPS'] !== '' && $_SERVER['HTTPS'] === 'on') {
    return '<a href="https://'.$_SERVER['HTTP_HOST'].'/verify.php?email='.$row[0].'&hash='.$row[1].'">Verify contact email</a>';
    } else {
    return '<a href="http://'.$_SERVER['HTTP_HOST'].'/verify.php?email='.$row[0].'&hash='.$row[1].'">Verify contact email</a>';
    }

    $mysqli->close();
    
}

$to       = 'name@example.com';
$subject  = 'Verify your XKCD contact email address';
$message  = '
<html>
<head>
<title>Verify '.$to.' as your contact email address</title>
</head>
<body>
<p>Hi, there!</p>
<p>Please verify that you want to use '.$to.' as the contact email address for your XKCD account</p>
<p>XKCD will use this email to tell you about interesting comics updates.</p>
<div>'.verifyLink().'</div>
<h3>Do not recognise this activity?</h3>
<p>If you did not add '.$to.' to your XKCD account, ignore this email and that address will not be added to your XKCD account. Someone may have made a mistake while typing their own email address.</p>
</body>
</html>
';

// Carriage return type (RFC).
$eol = "\r\n";

$headers  = "Reply-To: Name <name@example.com>".$eol;
$headers .= "Return-Path: Name <name@example.com>".$eol;
$headers .= "From: Name <name@example.com>".$eol;
$headers .= "Organization: Hostinger".$eol;
$headers .= "MIME-Version: 1.0".$eol;
$headers .= "Content-type: text/html; charset=iso-8859-1".$eol;
$headers .= "X-Priority: 3".$eol;
$headers .= "X-Mailer: PHP".phpversion().$eol;


mail($to, $subject, $message, $headers);

用这个脚本发送了电子邮件

<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";
    }
  }
?>

一旦你按下发送电子邮件按钮，电子邮件将被发送到Test@example.com