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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11328

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.

Shangxuetang MySQL video tutorial

Course Advanced 17632

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.

Band of Brothers front-end example display video tutorial

Course Advanced 11343

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.

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Brew installed php extension and did not find the specified configuration option

Hello everyone, I got the following error when using php verification code: I found the reason is because the FreeType library in gd is missing. Check phpinfo: I have uninstalled the existing php through brew, through: {code...} I want to reinstall the above content, but it prompts: I have also installed br...

2017-06-26 10:49:12

php - How to output image in base64

It's like this. Today I wrote a template for PHP to generate verification codes based on the information on the Internet: {code...} But I don't want him to output the image directly, but output the image in base64. How should I do it? I have tried many methods without success, unless it is necessary: {code...} Please tell me how to use getC...

2017-05-24 11:32:19

Ways to fix issue 2003 (HY000): Unable to connect to MySQL server 'db_mysql:3306' (111)

I recently tried to containerize my FastAPIPython server (also for replication/doubling purposes). Before, I had just a MySQL server in a Docker container and everything was fine, but when I also made my web server a service, it couldn't connect to the MySQL server, so now the application doesn't work. Below is the code snippet of the server database initialization connector in the application fromfastapiimportFastAPIimportmysql.connectorapp

2023-09-05 11:18:47

Experiment with sorting after query limit

So this is my first question here, please forgive me if something is wrong. I'm trying to make a sort query based on constraints. So there is a Customers table with 90 records. I want to first perform a query limited to 3 records, and then sort the results of this query by a column called ContactName. I think this might be a nested query. Nested queries run fine in SQLServer, but don't know how to implement it in MySQL. Limit query: Select*fromcustomerslimit

2023-09-05 14:46:42

CSS Grid: Create new row when child content overflows column width

I have a two column layout based on CSS grid. When the content of the second column exceeds 1fr I want to create a new row. As it currently stands, the content simply overflows the column. One requirement of this layout is that the items in the right menu column are in one row. I achieve this with: .right-menu{...grid-auto-flow:columndense;...} If I remove the grid-auto-flow attribute, the overflow stops. However, the items are now stacked into multiple rows, which is not what I want. I also tried converting .ri

2023-09-05 15:18:28

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PHP verification code class based on GD library and supports Chinese and English fonts, backgrounds, interference points, lines, distortions, etc.

Course Introduction：This article introduces in detail the PHP verification code class based on the GD library (supports Chinese and English fonts, backgrounds, interference points and lines, distortion...), which has certain reference value. Let's take a look at it together.

2017-07-15 comment 0 1022

How to do verification code in php

Course Introduction：PHP verification code production is an assessment of the basic skills of PHP. PHP verification code production must open the gd library, because many functions in the gd library are used.

2019-09-27 comment 0 3265

How to create php verification code?

Course Introduction：PHP verification code production is an assessment of PHP basic skills. PHP verification code production must open the gd library because it requires the use of many functions in the gd library.

2017-08-03 comment 0 2314

How to implement php verification code

Course Introduction：PHP verification code implementation steps: generate base image (depends on PHP image processing library GD); generate verification content (generate random numbers, use PHP function rand()); generate verification code image; verify verification content (requires PHP SESSION basic operation, Save verification content on the server side; front-end Ajax basics).

2019-09-16 comment 0 6612

How to use PHP to strengthen CAPTCHA and anti-bot technology security

Course Introduction：How to use PHP to strengthen the security of verification code and anti-bot technology In today's Internet era, verification code and anti-bot technology are widely used in various websites and applications to ensure user security and data confidentiality. As a widely used server-side scripting language, PHP has powerful and flexible functions that can effectively implement verification codes and anti-bot technology. 1. Use the GD library to generate verification code images. The GD library is an extension library of PHP that can be used to generate verification code images. By using the GD library, we can easily

2023-06-29 comment 0 1227

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