PHP email reading confirmation: Ensure that the email is read by the recipient.

PHP Email Reading Confirmation: Ensure that the email is read by the recipient

In the modern communication era, email has become an indispensable part of people's work and life. . However, sending an email does not ensure that the recipient has read it. Sometimes, we need to ensure that the email is received and read correctly. In this case, we can use the email reading confirmation function.

Email reading confirmation is a technical means used to confirm whether the recipient of the email has opened the email content. In practical applications, a common way is to add a special picture or link when sending an email. When the recipient opens the email, the picture or link will send a request to the server, thus triggering a reading confirmation. In this article, we will use PHP to implement the email reading confirmation function.

First, we need a PHP function to send emails. Here is a simple example:

function sendConfirmationEmail($to, $subject, $message) {
    $from = 'sender@example.com';
    $headers = "From: $from
";
    $headers .= "MIME-Version: 1.0
";
    $headers .= "Content-type: text/html; charset=UTF-8
";
    
    // 添加阅读确认相关的HTML标签
    $message = '<img  src="https://example.com/confirm.php?email=?x-oss-process=image/resize,p_40' . urlencode($to) . '"    style="max-width:90%"  style="max-width:90%" style="display:none;" alt="PHP email reading confirmation: Ensure that the email is read by the recipient." >' . $message;
    
    return mail($to, $subject, $message, $headers);
}

In this function, we first set the sender's address and email header information. Then, we use a hidden image to trigger the reading confirmation. The image link address is https://example.com/confirm.php, and uses the recipient's email address as a parameter. Finally, we called the mail function to send the email.

Next, we need to create a PHP file confirm.php for receiving email read confirmation requests. The following is a sample code:

$email = $_GET['email'];

// 在这里处理邮件阅读确认，可以记录日志或更新数据库等操作

// 返回一个空的1像素GIF图片作为响应
header('Content-Type: image/gif');
echo base64_decode('R0lGODlhAQABAIAAAP///////yH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==');

In this file, we first obtain the email parameter passed in the URL, which is the recipient's email address. We can then do some processing, such as logging or updating the database, to record that the email has been read. Finally, we return an empty 1-pixel GIF image as a response, so that the image on the page where the email is sent will request this image from the server, triggering the email reading confirmation.

Using these two code examples, we can implement a simple email reading confirmation function. When we send an email, the image link in the email will send a request to the confirm.php file to confirm whether the email is received and read correctly.

It should be noted that this method is not 100% reliable, because some email clients or readers may prohibit the loading of external images, causing the email reading confirmation function to fail. Additionally, recipients can choose to disable email read confirmations or use a plug-in similar to an email filter to block confirmation requests.

To summarize, the PHP email reading confirmation function can help us confirm whether the email is correctly received and read by the recipient. We can achieve this functionality by adding a special image or link to trigger a read confirmation request and processing it accordingly on the server side. However, it is important to note that this method is not 100% reliable, but will still work for most snail mail.

I hope this article can help you implement the email reading confirmation function and improve your email communication experience.

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