With the growth of the internet, email has become a vital communication tool and plays a key role in identity verification and security. Captchas embedded in emails are particularly important to prevent malicious activities. This article will guide you on how to send emails containing multiple image captchas using PHP, including sample code.
The following items are needed to implement this feature:
<span class="fun">sudo apt-get install php7.4-gd</span>
<?php
session_start();
<p>$captcha = imagecreatetruecolor(100, 50);<br>
$bgColor = imagecolorallocate($captcha, 255, 255, 255);<br>
$fontColor = imagecolorallocate($captcha, 0, 0, 0);<br>
$code = rand(1000, 9999);</p>
<p>$_SESSION['captcha'] = $code;</p>
<p>imagefill($captcha, 0, 0, $bgColor);<br>
imagettftext($captcha, 20, 0, 10, 30, $fontColor, 'path/to/font.ttf', $code);</p>
<p>header('Content-Type: image/png');<br>
imagepng($captcha);<br>
imagedestroy($captcha);<br>
?><br>
This is a basic example for generating a captcha. It does not include advanced font effects or interference lines. Adjust according to your needs.
<?php
require 'path/to/PHPMailerAutoload.php';
<p>$mail = new PHPMailer;<br>
$mail->isSMTP();<br>
$mail->Host = 'smtp.example.com';<br>
$mail->SMTPAuth = true;<br>
$mail->Username = '<a class="cursor-pointer" rel="noopener">username@example.com</a>';<br>
$mail->Password = 'password';<br>
$mail->SMTPSecure = 'tls';<br>
$mail->Port = 587;</p>
<p>$mail->setFrom('<a class="cursor-pointer" rel="noopener">from@example.com</a>', 'Your Name');<br>
$mail->addAddress('<a class="cursor-pointer" rel="noopener">to@example.com</a>', 'Recipient Name');<br>
$mail->Subject = 'Subject';<br>
$mail->Body = 'This is the HTML message body';</p>
<p>$captcha = 'path/to/captcha.png';<br>
$mail->AddAttachment($captcha);</p>
<p>if (!$mail->send()) {<br>
echo 'Mailer Error: ' . $mail->ErrorInfo;<br>
} else {<br>
echo 'Message sent!';<br>
}<br>
?><br>
Replace path/to/ with your actual file paths.
<!DOCTYPE html>
<html>
<head>
<title>Send Email with Captcha</title>
</head>
<body>
<img src="Captcha.php" alt="Captcha Image">
<form method="post" action="send_email.php">
<input type="text" name="captcha" placeholder="Enter Captcha">
<input type="submit" value="Send Email">
</form>
</body>
</html>
The page loads the captcha image via . Users enter the captcha and submit the form to trigger email sending.
This article demonstrates how to use PHP along with PHPMailer and the GD library to send emails containing multiple image captchas. This method effectively enhances email security and is suitable for applications requiring email identity verification. The provided code is simple and easy to understand; you should improve security measures and captcha complexity as needed for your project.