This article is mainly for everyone to detail This article introduces the generation code of PHP image verification code, which has certain reference value. Interested friends can refer to it
The example in this article shares a generated image verification code encapsulated in PHP for your reference. The specific content is as follows
1. Code
index..php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>js+GD2函数制作无刷新验证码</title>
<link rel="stylesheet" type="text/css" href="css/style.css" rel="external nofollow" >
</head>
<body>
<p style="width: 750px; border: 1px solid #0D6C8C; text-align: left">
<p style="width:100%; height:25px; border:1px #FFFFFF solid; background:url(img/t-background.gif); color:#FFFFFF; padding-top:5px; padding-left:20px; text-align:left">填写用户注册信息</p>
<p style="width:400px; text-align:left; padding-left:50px; padding-top:15px; float:left">
<script language="javascript">
function chkinput(form)
{
if (form.username.value==''){
alert('请输入用户名！');
form.username.focus();
return false;
}
if (form.password.value==''){
alert('请输入注册密码！');
form.password.focus();
return false;
}
if (form.defPassword.value==''){
alert('请输入确认密码！');
form.defPassword.focus();
return false;
}
if (form.password.value.length<6){
alert('密码长度应大于6位！');
form.password.focus();
return false;
}
if (form.password.value!=form.defPassword.value){
alert('密码与确认密码不同！');
form.password.focus();
return false;
}
if (form . email . value == "") {
alert("请输入E-mail地址!");
form . email . select();
return (false);
}
var i= form . email . value . indexOf("@");
if (i < 0) {
alert("请输入正确的E-mail地址!");
form . email . select();
return (false);
}
if (form . tel . value == "") {
alert('请输入电话号码！');
form . tel . focus();
return (false);
}
var t=/^([0-9]|[\-])+$/g;
if (! t . test(form . tel . value) || form . tel . value . length > 18 || form . tel . value . length < 7) {
alert('电话格式输入有误！');
form . tel . focus();
return (false);
}
if (form.address.value==''){
alert('请输入联系地址！');
form.address.focus();
return false;
}
if (form.validatorCode.value==''){
alert('请输入验证码！');
form.validatorCode.focus();
return false;
}
if (form.validatorCode.value!=form.defValidatorCode.value) {
alert('验证码输入有误！');
form.validatorCode.focus();
return false;
}
return true;
}
</script>
<form name="form1" method="post" action="success.php" onSubmit="return chkinput(this)">
用户名： <input type="text" name="username" size="30" class="input" /><br><br>
密 码： <input type="password" name="password" size="30" class="input" /><br><br>
确认密码：<input type="password" name="defPassword" size="30" class="input"><br><br>
E-mail： <input type="text" name="email" size="30" class="input" /><br><br>
电话： <input type="text" name="tel" size="30" class="input" /><br><br>
联系地址：<input type="text" name="address" size="30" class="input" /><br><br>
验证码： <input type="text" name="validatorCode" size="10" class="input" />
<input type="hidden" name="defValidatorCode" value="" />
<script language="javascript">
var num1=Math.round(Math.random()*10000000);
var num=num1.toString().substr(0,4);
document.write("<img src="/static/imghwm/default1.png" data-src="TestCode.php?code=" class="lazy" name=codeimg src='TestCode.php?code="+num+"' alt="PHP image verification code generation sample code" >");
form1.defValidatorCode.value=num;
function reCode(){
var num1=Math.round(Math.random()*10000000);
var num=num1.toString().substr(0,4);
document.codeimg.+num;
form1.defValidatorCode.value=num;
}
</script>
<a href="javascript:reCode()" rel="external nofollow" class="a1">看不清</a>
<br><br>
<input type="submit" value="提交"> <input type="reset" value=" 重写">
</form>
</p>
<p style="width:300px; float:right; padding-top:20px">
<p style="width:285px; height:250px; border:1px dotted #999999; background:#E9F2F7; OVERFLOW-X: auto; OVERFLOW-Y:auto; text-align:left; line-height:20px">
用户在使用***网站网络服务过程中，必须遵循以下原则：<br />
1、遵守中国有关的法律和法规。不得利用本站危害国家安全、泄露国家秘密，不得侵犯国家社会集体的和公民的合法权益。不得利用***网站网络服务系统进行任何不利于***网站的行为。<br />
2、遵守所有与网络服务有关的网络协议、规定和程序。<br />
3、不干扰或混乱网络服务。<br />
4、不得为任何非法目的而使用本网络服务系统。<br />
5、不得传播任何虚假的、骚扰性的、中伤他人的、辱骂性的、恐吓性的、庸俗的或其他任何非法的信息资料。<br />
6、不得侵犯其他任何第三方的专利权、著作权、商标权、名誉权或其他任何合法权益。<br />
7、不得在论坛BBS或留言簿发表任何与政治相关的信息。 <br />
8、遵守所有使用网站服务的网络协议、规定、程序和惯例。<br />
9、如发现任何非法使用用户帐号，应立即通告***网站。<br />
10、如用户在使用网络服务时违反上述任何规定，***网站有权要求用户改正或直接取消该帐号并停止为该用户提供相关的网络服务。<br />
</p>
</p>
</p>
<?php
require_once 'footer.php';
?>
</body>
</html>TestCode.php
<?php
class TestCode{//创建类名为TestCode
private $width;
private $height;
private $str;
private $im;
private $strColor;
function construct($width,$height){
$this->width=$width;
$this->height=$height;
$this->str=$_GET['code'];
$this->createImage();
}
function createImage(){
$this->im=imagecreate($this->width,$this->height);//创建画布
imagecolorallocate($this->im,200,200,200);//为画布添加颜色
for($i=0;$i<4;$i++){//循环输出四个数字
$this->strColor=imagecolorallocate($this->im,rand(0,100),rand(0,100),rand(0,100));
imagestring($this->im,rand(3,5),$this->width/4*$i+rand(5,10),rand(2,5),$this->str[$i],$this->strColor);
}
for($i=0;$i<200;$i++){//循环输出200个像素点
$this->strColor=imagecolorallocate($this->im,rand(0,255),rand(0,255),rand(0,255));
imagesetpixel($this->im,rand(0,$this->width),rand(0,$this->height),$this->strColor);
}
}
function show(){//
header('content-type:image/png');//定义输出为图像类型
imagepng($this->im);//生成图像
imagedestroy($this->im);//销毁图像释放内存
}
}
$image=new TestCode(80,20);//将类实例化为对象
$image->show();//调用函数
?>2. Running results
The above is the detailed content of PHP image verification code generation sample code. For more information, please follow other related articles on the PHP Chinese website!
PHP in Action: Real-World Examples and ApplicationsApr 14, 2025 am 12:19 AMPHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.
PHP: Creating Interactive Web Content with EaseApr 14, 2025 am 12:15 AMPHP makes it easy to create interactive web content. 1) Dynamically generate content by embedding HTML and display it in real time based on user input or database data. 2) Process form submission and generate dynamic output to ensure that htmlspecialchars is used to prevent XSS. 3) Use MySQL to create a user registration system, and use password_hash and preprocessing statements to enhance security. Mastering these techniques will improve the efficiency of web development.
PHP and Python: Comparing Two Popular Programming LanguagesApr 14, 2025 am 12:13 AMPHP 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.
The Enduring Relevance of PHP: Is It Still Alive?Apr 14, 2025 am 12:12 AMPHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.
PHP's Current Status: A Look at Web Development TrendsApr 13, 2025 am 12:20 AMPHP remains important in modern web development, especially in content management and e-commerce platforms. 1) PHP has a rich ecosystem and strong framework support, such as Laravel and Symfony. 2) Performance optimization can be achieved through OPcache and Nginx. 3) PHP8.0 introduces JIT compiler to improve performance. 4) Cloud-native applications are deployed through Docker and Kubernetes to improve flexibility and scalability.
PHP vs. Other Languages: A ComparisonApr 13, 2025 am 12:19 AMPHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.
PHP vs. Python: Core Features and FunctionalityApr 13, 2025 am 12:16 AMPHP and Python each have their own advantages and are suitable for different scenarios. 1.PHP is suitable for web development and provides built-in web servers and rich function libraries. 2. Python is suitable for data science and machine learning, with concise syntax and a powerful standard library. When choosing, it should be decided based on project requirements.
PHP: A Key Language for Web DevelopmentApr 13, 2025 am 12:08 AMPHP 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
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
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.
MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.
SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment
