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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11322

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 17629

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 11333

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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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

PHP full text search functionality using AND, OR and NOT operators

Newbie question: I'm trying to implement a full text search on a search string using php and eloquent. $searchstring="+(victimsuspect)+crime-covid";$searchresult=RssItem::whereRaw("MATCH(description)AGAINST('$searchstring'INBOOLEANMODE)")->ge

2023-09-05 15:06:32

Shortest way to convert all PHP types to string

I'm writing a general system that I hope can one day be applied to fields like medicine (i.e. it's "scientific"). I think the best way is to represent all the data in php with strings (true will be "true", false will be "false" and so on). The reason for this is that in php any value has a unique string representation (such as the php code itself). I post this question to speed up the design process of this program. Some values are easily converted to strings: numbers, booleans, etc. Some are not easy: objects, arrays, resources. I think the transfer object and

2023-09-05 15:34:44

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How to generate photo album album using PHP

Course Introduction：How to use PHP to generate photo albums Photo albums are one of the important ways for people to record their lives and share beautiful moments. In the Internet era, we can use PHP technology to dynamically generate photo albums to facilitate users to upload, manage and browse photos. This article will introduce the method of using PHP to generate photo album albums, and provide specific code examples to help readers quickly implement the photo album function. 1. Create a photo album database First, we need to create a photo album database to store relevant information of the photo album. Assume our database is named "album_d

2023-09-13 comment 0 854

How to use JS and Baidu Maps to implement map traffic display function

Course Introduction：How to use JS and Baidu Maps to implement the map traffic display function requires specific code examples. Baidu Maps, as the leading domestic map service provider, provides a rich API interface that can easily integrate map-related functions into websites or applications. Among them, the map traffic display function is required by many applications, such as travel applications, real-time traffic monitoring, etc. The following will introduce how to use JS and Baidu Maps to implement the map traffic display function, and provide specific code examples. 1. Preparation: Register a Baidu Map developer account and create an application

2023-11-21 comment 0 1108

PHP development skills: How to implement the verification code function

Course Introduction：PHP development skills: How to implement the verification code function Verification code (CAPTCHA) is a common technology used to verify user identity and is widely used in website development. Verification codes can effectively prevent malicious registration by robots, brute force cracking and other malicious behaviors, and improve the security of the website. This article will introduce how to use PHP language to implement the verification code function and provide specific code examples. 1. Generate verification code Generating verification code is the first step to realize the verification code function. We can create pictures through the GD library and draw randomly generated

2023-09-21 comment 0 2129

How to use PHP to generate customizable style verification code images

Course Introduction：How to use PHP to generate a customizable style verification code. Image verification code is a technical means used to prevent malicious access or registration by robots. By generating verification codes that are difficult to recognize by machines, the security of the website can be effectively improved. This article will introduce how to use PHP to generate customizable style verification code images and provide specific code examples. First, we need to clarify the basic requirements of the verification code. Generally speaking, the verification code should contain some random letters and numbers, and have a certain distortion effect to increase the difficulty of machine recognition. at the same time,

2023-09-13 comment 0 769

Evaluation and testing of practical application effects of Baidu AI interface in Java development

Course Introduction：Evaluation and testing of the actual application effect of Baidu AI interface in Java development Introduction: With the continuous development of artificial intelligence and machine learning technology, Baidu AI interface has become the first choice of many developers in their projects. Baidu AI interface includes a variety of powerful services, such as image recognition, face recognition, speech recognition, etc. This article will introduce in detail the actual application effect evaluation and testing of Baidu AI interface in Java development, and give corresponding code examples. 1. Preparation Before starting, we need to register on the official website

2023-08-12 comment 0 803

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