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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11329

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 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.

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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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PHP verification code class ValidateCode

Course Introduction：This article mainly provides a detailed analysis of the PHP verification code class ValidateCode, which has certain reference value. Interested friends can refer to it.

2018-05-04 comment 0 2554

php click captcha verification code class

Course Introduction：Most of the commonly used form verification codes now require user input, but this will be inconvenient for mobile users. If mobile users visit, they don’t need to enter it. Instead, they can click a certain location to confirm the verification code, which will be much more convenient.

2017-02-18 comment 0 1275

PHP verification code class example sharing

Course Introduction：This article mainly introduces a practical PHP verification code class for everyone, which has certain reference value. Interested friends can refer to it. I hope it can help everyone.

2018-02-10 comment 0 1534

PHP implements SMS verification code for checking mobile phone number and IMEI

Course Introduction：This article shares with you a php class that can verify the mobile phone number and IMEI SMS verification code and send it. It is very practical. It is recommended to everyone here. Friends in need can refer to it.

2018-06-11 comment 0 3475

Java generates Chinese character random verification code

Course Introduction：The implementation mainly includes two classes, one is to generate the verification code, and the other is to determine whether the verification code input is correct. The implementation principle is relatively simple. Generate pictures of Chinese characters and interference lines and save the Chinese characters to the session. The front desk obtains the verification code picture generated each time. For display, during verification, the value entered in the text box is obtained and sent to the background for comparison with the session value. The function is as simple as that. 1. Class for generating Chinese character verification codes package com.veryCode; import java.awt.Color; import java.aw ...

2016-12-02 comment 0 3943

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