Backend Development
PHP Tutorial
How to send email with multiple image verification codes using PHP
How to send email with multiple image verification codes using PHP
How to use PHP to send emails with multiple image verification codes
With the development of the Internet, email serves as an important transmission tool in our daily lives play an increasingly important role. The email verification code also plays a vital role in verifying user identity and improving security. This article will introduce how to use PHP to send emails with multiple image verification codes and provide specific code examples.
To send emails with multiple image verification codes, we first need to prepare the following preparations:
- A server environment that supports the PHP programming language;
- PHP email sending class library, such as PHPMailer;
- Picture verification code generation class library, such as GD library.
Then we follow the following steps:
Step 1: Install PHPMailer and GD library
- Install the PHPMailer class library on the server, you can use Composer to install, or you can directly download the relevant files and introduce them into the project;
- Make sure the GD library is installed on the server. If it is not installed, you can use the following command to install it:
sudo apt-get install php7.4-gd
Steps Two: Generate image verification code
- Create a file named
Captcha.php, which will contain the relevant code to generate the image verification code; - In
Captcha.php, use the GD library to generate a verification code image, and save the verification code to the session or database for subsequent verification; - The following is a simple code example :
<?php
session_start();
$captcha = imagecreatetruecolor(100, 50);
$bgColor = imagecolorallocate($captcha, 255, 255, 255);
$fontColor = imagecolorallocate($captcha, 0, 0, 0);
$code = rand(1000, 9999);
$_SESSION['captcha'] = $code;
imagefill($captcha, 0, 0, $bgColor);
imagettftext($captcha, 20, 0, 10, 30, $fontColor, 'path/to/font.ttf', $code);
header('Content-Type: image/png');
imagepng($captcha);
imagedestroy($captcha);
?>Please note that the above code only provides a simple verification code generation example, and does not involve more complex verification code effects such as fonts and interference lines.
Step 3: Send email
- Create a file named
send_email.php, which will contain the relevant code for sending emails; - In
send_email.php, introduce the PHPMailer class library and make relevant settings; - Add the image verification code as an email attachment and send the email to the target user;
- The following is a simple code example:
<?php
require 'path/to/PHPMailerAutoload.php';
$mail = new PHPMailer;
$mail->isSMTP();
$mail->Host = 'smtp.example.com';
$mail->SMTPAuth = true;
$mail->Username = 'username@example.com';
$mail->Password = 'password';
$mail->SMTPSecure = 'tls';
$mail->Port = 587;
$mail->setFrom('from@example.com', 'Your Name');
$mail->addAddress('to@example.com', 'Recipient Name');
$mail->Subject = 'Subject';
$mail->Body = 'This is the HTML message body';
$captcha = 'path/to/captcha.png';
$mail->AddAttachment($captcha);
if (!$mail->send()) {
echo 'Mailer Error: ' . $mail->ErrorInfo;
} else {
echo 'Message sent!';
}
?>Please replace path/to/ in the above code with your actual file path.
Step 4: Reference the image verification code and the processing code for sending emails in the front-end page
- Create a file named
index.html. This file The relevant code for displaying the image verification code and sending the email will be included; - The following is a simple sample code:
<!DOCTYPE html>
<html>
<head>
<title>Send Email with Captcha</title>
</head>
<body>
<img src="/static/imghw/default1.png" data-src="Captcha.php" class="lazy" alt="Captcha">
<form method="post" action="send_email.php">
<input type="text" name="captcha" placeholder="Enter Captcha">
<input type="submit" value="Send Email">
</form>
</body>
</html>In the above sample code, pass<img src="/static/imghw/default1.png" data-src="Captcha.php" class="lazy" the alt="How to send email with multiple image verification codes using PHP" > tag refers to the generated image verification code, and adds an input box to the form for entering the verification code. After the user enters the verification code and submits the form, the action of sending an email will be triggered.
At this point, we have completed all the steps of using PHP to send emails with multiple image verification codes. Through the implementation of the above steps, we can add an image verification code attachment to the email to improve the security of the email. Please note that the above code only provides a simple example to get started, and does not perform actual security processing. Specific use requires more security optimization based on actual scenarios.
The above is the detailed content of How to send email with multiple image verification codes using PHP. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1655
14
1414
52
1307
25
1254
29
1228
24
PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian
Dec 24, 2024 pm 04:42 PM
PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
How do you parse and process HTML/XML in PHP?
Feb 07, 2025 am 11:57 AM
This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an
Explain late static binding in PHP (static::).
Apr 03, 2025 am 12:04 AM
Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.
PHP Program to Count Vowels in a String
Feb 07, 2025 pm 12:12 PM
A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total
What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases?
Apr 03, 2025 am 12:03 AM
What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
PHP and Python: Comparing Two Popular Programming Languages
Apr 14, 2025 am 12:13 AM
PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.
PHP: A Key Language for Web Development
Apr 13, 2025 am 12:08 AM
PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7
