Article Introduction：This article mainly introduces a practical PHP verification code class in detail, which has certain reference value. Interested friends can refer to it.

2017-08-11 comment 0  967

Article Introduction：php verification code class php verification code

2016-07-25 comment 0  1090

Article Introduction：This article mainly introduces the use of PHP to implement the verification code class. It has certain reference value. Now I share it with you. Friends in need can refer to it.

2018-04-18 comment 0  1432

Article Introduction：This article mainly introduces a practical PHP verification code class in detail, which has certain reference value. Interested friends can refer to it.

2018-05-19 comment 0  1307

Article Introduction：Verification code is indispensable in PHP websites. It can prevent malicious registration or submission, malicious cracking of passwords, ticket fraud, forum flooding, page brushing, etc. Verification code can also reduce server pressure. Then PHP Chinese website shares 10 good ones. The PHP verification code class is available for you to download and use.

2017-05-19 comment 0  6782

Article Introduction：php5 verification code class (simple and practical)

2016-07-25 comment 0  904

Article Introduction：How to implement verification code in PHP: first create a class for drawing verification code, with code such as "class Captcha {...}"; then draw the picture page; then set the form page; and finally create the verification page.

2021-06-03 comment 0  3073

Article Introduction：A method to implement captcha generation and verification functions using PHP arrays Captcha (CAPTCHA) is a technology used to verify whether the user is a human and not a machine. In operations such as website registration, login or form submission, verification codes can effectively prevent automated attacks by malicious programs. In this article, we will introduce how to use PHP arrays to generate and verify verification codes. 1. Generate verification code We can first define an array containing all possible verification code characters, and then generate a random verification code of specified length as needed. by

2023-07-15 comment 0  947

Article Introduction：PHP is a commonly used server-side scripting language that is not only powerful but also easy to learn and write. In website development, the generation and verification of verification codes are very important security measures. In this article, we will introduce how to use PHP to generate and verify verification codes. 1. What is a verification code? The verification code (CAPTCHA) is "CompletelyAutomatedPublicTuringtesttotellComputersandHu

2023-06-18 comment 0  1604

Article Introduction：Verification code, string: When the PHP verification code generated file is called separately, it does not match the actual string: I wrote a PHP verification code class myself. Later, when debugging, I found that when the PHP file that generated the verification code picture was called separately, the picture The verification code always does not match the actual verification code string; however, when the file is embedded into HTML, there is no such problem, everything is normal, which is very strange. After researching for a long time, I couldn’t figure out what the problem was. I was very confused. Later, I downloaded several PHP verification code classes written by other people on the Internet, and basically had the same problem. Since it took me a long time to figure it out, I thought it would be better to give it a try for the time being. Let it go. In addition, call that on the page

2016-07-29 comment 0  911

Article Introduction：A useful verification code PHP tool class

2016-07-25 comment 0  851

Article Introduction：Beautiful PHP verification code class

2016-07-25 comment 0  1285

Article Introduction：How PHP and UniApp implement verification code generation and verification In the web development process, verification code is a commonly used security verification method. By generating a random verification code and comparing it with the verification code entered by the user, you can effectively prevent bots and malicious attacks. This article will introduce how to use PHP and UniApp to implement the verification code generation and verification functions respectively, and provide corresponding code examples. 1. PHP method for generating verification codes PHP is a popular back-end programming language that can easily generate verification codes. The following is an example

2023-07-04 comment 0  1436

Article Introduction：PHP and XML: How to generate and verify verification code. Verification code is a technology used to verify user identity. It is commonly used in website login, registration, form submission and other scenarios. This article will introduce how to use PHP and XML to realize the verification code generation and verification functions. Generate verification code First, we need to generate an image containing random characters as a verification code. We will use PHP's GD library to create the image and draw the verification code string on the image. <?phpsession_start();

2023-08-07 comment 0  999

Article Introduction：This article mainly introduces a practical PHP verification code class for everyone, which has certain reference value. Interested friends can refer to it. I hope it can help everyone.

2018-02-10 comment 0  1534

Article Introduction：The example of this article describes the verification code tool class encapsulated in PHP. Share it with everyone for your reference, as follows: <?php//Verification code tool class class Captcha{ //Attributes private $width; private $height; private $fontsize; private $pixes; private $lines; private $str_len; / * *Construction

2017-02-27 comment 0  1201

Article Introduction：PHP realizes the generation and verification of image verification codes. In website development, in order to prevent malicious machine attacks or automatic registration, we often use image verification codes for verification. This article will introduce how to use PHP to generate and verify image verification codes, and give specific code examples. Generating an image verification code The key to generating an image verification code is to generate a random verification code string and draw it onto the image. The following is a sample code that generates an image verification code: &lt;?phpsession_start();//

2023-09-13 comment 0  976

Article Introduction：Complete example of php generating verification code and verification code verification

2016-07-25 comment 0  1040

Article Introduction：Human-machine verification code is a commonly used form of verification code, which can effectively prevent malicious robot attacks and malicious registration. As a server-side language, PHP is very suitable for implementing human-machine verification code functions. In this article, we will introduce how to implement human-machine verification code using PHP. Generate verification code image First, we need to generate verification code image. This process can be achieved by using the GD library. The GD library is an open source image processing library that can be used to generate and manipulate various types of images. In PHP, you can install the GD extension

2023-06-27 comment 0  1661

Article Introduction：Verification codes are often used in daily work, and there are various packages for verification code classes. This article implements a simple verification code class for your reference and can be used directly.

2019-08-29 comment 0  2651