Course Intermediate 10914
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.
Course Advanced 16845
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 10561
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.
In PHP, how to encode the generated verification code image into base64?
2017-05-27 17:42:38 0 2 1604
There is a problem with the final call of php to implement image verification code?
2022-05-05 01:22:00 0 8 1114
java - Image verification code implementation principle
2017-05-27 17:41:18 0 4 995
python selenium gets image verification code
2017-06-12 09:21:28 0 4 1555
Image verification code reports error after using session
2017-10-04 01:31:24 0 2 1363
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 0 865
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 0 894
Course Introduction: php 图片验证码用javascript验证本帖最后由 cyyjm 于 2013-08-15 11:48:37 编辑 现在我的图片验证是交到后台验证,感觉影响查询速度。如何交给javascript验证?php生成页面代码如下:
2016-06-13 comment 0 731
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 1879
Course Introduction:How to generate verification code image after saving remote image in PHP? With the development of the Internet, verification codes have become one of the important means of website security. CAPTCHA is an image or text-based verification mechanism that is often used to identify whether a user is a human or a machine. In some cases, we need to download an image from a remote server and display it as a captcha (verification code) image. This article will introduce how to use PHP to save remote images and generate verification code images. First, we need to use PHP
2023-07-12 comment 0 861