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Course Elementary 7636

Course Introduction：Composer is a dependency management tool for PHP. We can declare the external tool libraries we depend on in the project, and Composer will help you install these dependent library files. With it, we can easily use one command to reference other people's excellent code into our project. .

Initial use of webman and backend setup

Course Intermediate 11312

Course Introduction：Webman is a high-performance HTTP service framework developed based on Workerman. It is used to replace the traditional php-fpm architecture and provide ultra-high-performance and scalable HTTP services. You can use webman to develop websites, or you can develop HTTP interfaces or microservices. Webman also supports custom processes and can do anything that Workerman can do, such as websocket services, Internet of Things, games, TCP services, UDP services, unix socket services, etc.

Use of full-screen scrolling plug-in fullpage-cool shopping cart case

Course Elementary 2876

Course Introduction：This case uses the fullpage full-screen scrolling plug-in to allow you to quickly and efficiently develop full-screen scrolling pages. Material download address: https://gitee.com/xiaoqiang001/full_screen_plugin.git

Self-study IT network Linux load balancing video tutorial

Course Intermediate 11360

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.

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Use of undefined constant USER_ID - assumed 'USER_ID'

Use of undefined constant USER_ID - assumed 'USER_ID' shows that the constant I defined is wrong.

2017-09-16 01:44:57

A usage in python is unclear

In the process of writing a crawler in Python (crawling Wikipedia entries), the url["href"] appeared during the output process of using the iterator. I thought it should belong to a usage in the iterator, but I couldn't find it. Please help me with this usage. I mean, thank you for the url["href"] in the last line of {code...}, which is obtained by crawling...

2017-05-18 10:59:46

Does PDO need to be installed in advance when using it?

Hello teacher, does PDO need to be installed or configured in advance when using it?

2019-08-03 18:05:50

python redis multi-process use

{Code...} According to the documentation, I wrote a redis client with a connection pool, and then generated an instance for global use. Sharing an instance in multiple threads has been tested normally. However, in the case of multiple processes, the test fails. {Code...} is written like this. When executing start, an error will be reported and serialization cannot be performed. change...

2017-06-08 11:02:09

Query causing huge CPU utilization and high latency

The following query is causing huge CPU utilization and high latency in my database environment. I tried using different types of indexes to improve query performance, but unfortunately any index did not help improve performance. Is there any suggestion to rewrite the query to get the same result. querySELECTkln.qsw,kln.mngyFROM(SELECTkln2.mngy,MAX(kln2.nonUnixjdjf)dm_hjFROMmfh.view_matskln2WHEREkln2.jdjf<='

2024-01-10 17:21:24

MoreQ&A

How to Optimize MySQL Queries with \'Using index; Using temporary; Using filesort\' Error?

Course Introduction：Dealing with "Using index; Using temporary; Using filesort" Error in MySQL QueriesA common concern when working with MySQL queries is encountering...

2024-11-04 comment 0 854

Why is My MySQL Query Using \'Using Index; Using Temporary; Using Filesort\'?

Course Introduction：Using Index, Using Temporary, Using Filesort: Does Your MySQL Query Need Optimization?When retrieving data from database tables, it's crucial to...

2024-11-04 comment 0 833

MySQL BETWEEN Usage

Course Introduction：MySQL BETWEEN Usage

2016-12-27 comment 0 3940

Active use and passive use like Java

Course Introduction：Other ways of using Java classes can be regarded as passive use and will not cause the initialization of the class.

2017-01-17 comment 0 1647

First use of SASS

Course Introduction：This time I will bring you the first use of SASS. What are the precautions when using SASS for the first time? The following is a practical case, let’s take a look.

2018-03-19 comment 0 1729

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