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Course Introduction："Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.

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Course Introduction："Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.

Course Advanced  11344

Course Introduction："Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.

Course 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: <?phpsession_start();//

2023-09-13 comment 0  975

Course Introduction： 验证码的一个类，怎么就是不出来图片呢自己闲着没事，自定义了一个验证码生成的类，但是不知道为什么，图片就是现实不出来。还请高手指点一下。

2016-06-13 comment 0  749

Course Introduction：How to use PHP to generate refreshable image verification codes. With the development of the Internet, in order to prevent malicious attacks and automatic machine operations, many websites use verification codes for user verification. One common type of verification code is the image verification code, which generates a picture containing random characters and requires the user to enter the correct characters before proceeding. This article will introduce how to use PHP to generate refreshable image verification codes and provide specific code examples. Step 1: Create a verification code image First, we need to create a verification code image

2023-09-13 comment 0  1139

Course Introduction：这篇文章主要给大家讲解php生成图片验证码，包括数字验证码、数字和字母验证码、中文验证码、仿google验证码、算术验证码，实现此功能主要通过GD库，生成一张带有验证码的图片，并把验证码存在session中，

2016-05-30 comment 0  992

Course Introduction：How to generate a verification code using PHP Image verification code (CAPTCHA) is a common technique used to authenticate users or restrict access to automated programs. By generating random images and requiring users to identify the correct characters or images, CAPTCHAs can effectively prevent bot attacks and spam registrations. In this article, we will introduce how to use PHP to generate a verification code image and display it on the page. First, we need to create a PHP file to generate the verification code image. You can name it captcha.php and make sure

2023-08-19 comment 0  1978