Course Intermediate 11425
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 17717
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 11416
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.
php adds human-machine verification code
2020-10-22 16:47:44 0 1 1397
How to write a regex in php to verify email and mobile phone number at the same time?
2017-05-16 13:06:44 0 3 735
Validating phone number length using jquery doesn't work
2024-03-30 11:39:59 0 1 473
2017-11-06 13:50:30 0 9 1254
javascript - Native JS implementation of sending verification code seconds
2017-07-05 10:44:00 0 3 809
Course Introduction：php random verification code php generates random verification code (graphic and text)
2016-07-25 comment 0 1278
Course Introduction：Randomly output verification code!
2016-08-04 comment 0 1572
Course Introduction：How to implement a four-digit random verification code in JavaScript: first create a random number through "function random(max,min){...}"; then create a random four-digit verification code through "function code(){...}"; Finally, call the verification code function.
2021-07-01 comment 0 5549
Course Introduction：Use PHP's GD library to generate a picture with a verification code and save the verification code in the Session. You can use the rang() function to generate random verification codes; use the imagecolorallocate() method to assign colors to images; use ajax to refresh and generate new verification codes when you click on the verification code.
2019-09-29 comment 0 4572
Course Introduction：Random verification codes are a common way for modern websites to prevent malicious attacks and fraud. Many websites use random verification codes in login, registration, password retrieval and other pages. Among them, PHP, as a commonly used back-end programming language, is often used to generate random verification codes. However, sometimes we encounter a common problem: the random verification code cannot be generated. So, what exactly causes this error? This article will analyze the reasons why the random verification code cannot be generated and give possible solutions. 1. There is a problem with the verification code generation function. In PHP, we can use the function
2023-04-19 comment 0 850
