PHP uses recursion to find data hierarchically
Today I'll focus on using recursion to find data hierarchically.The principle is very simple. It is mainly to find the children through the paren...
Using sentry in hyperf
sentry document: https://docs.sentry.io/ After being familiar with the exception catching mechanism of the hyperf architecture, I think sentry can be ...
Leetcode PHP solution -- D63 917. Reverse Only Letters
D63 917. Reverse Only Letters Title Link 917. Reverse Only Letters Title Analysis Given a string containing symbols, it only reverses the occurrence o...
What's a Facade? I hope it's useful for PHPer
What is the Facade? At present, it is a class that is used to facilitate the static method call of the original class (undefined static method).The sp...
Laravel queue technique: Fail, Retry, or Delay
The article was forwarded from the professional Laravel developer community with the original link: https://learnku.com/laravel/t... When creating qu...
The mathematical functions of php arrays
There are some math related functions in the php array, most of which start with array and underline with a math English word, as follows: 1 array_dif...
centos nginx https configuration
1. What if you want to configure a domain name to a specified directory server { listen 80; server_name Change your domain name here,for example baidu...
Implementation of Swoole Redis connection pool
This article only implements a Redis connection pool, which is too short. By the way, integrate the previous several articles.These points are roughly...
Common skills of unit test (PHPUnit + Laravel)
1. Data provider To provide parameters and results, use the @ dataProvider annotation to specify which data provider method to use. For example, to ch...
Convert nested JSON data to TABLE
Prepare some data first: Create a temporary table to store: DECLARE @json_table AS TABLE ( [type] NVARCHAR(MAX), [desc] NVARCHAR(MAX) ) Source Code Ge...
[CH4201] Loulan Totem
I use tree array to solve this problem After we read in the data, we analyze the problem and solve two problems: the number of '^' and the n...
Codeforces 444C DZY Loves Colors
<Title Link> Main idea: Given an interval of $[1,n] $($1\leq10^5 $), the color of each position in the interval is its interval subscript. Now t...
Example code of message board function implemented in PHP
The example of this paper shares the realization idea of php message board for your reference. The specific content is as follows: 1. Create a file na...
PHP method of generating order number
The first way to generate unique order number in PHP PHP code $str = date('Ymd') . str_pad(mt_rand(1, 99999), 5, '0', STR_PAD_LEFT...
Python homework 5 - Zhu Mingquan
Exercise 1: read in the file pmi_days.csv, and complete the following operations:1. Count the days corresponding to the quality level, for example:Exc...
HDU2023 average - biaobiao88
Title Link: http://acm.hdu.edu.cn/showproblem.php?pid=2023 Average performance Problem Description Suppose that there are n (n < = 50) students in ...
How to batch insert data in mysql with php
If I have such a table, I want to insert a lot of data into it 1 CREATE TABLE IF NOT EXISTS `user_info` ( 2 `id` int(11) NOT NULL AUTO_INCREMENT COMME...
PHP analyzes the dependency injection function of Laravel framework from another perspective
Fundamentally speaking, dependency injection is not to let an object create a dependency, nor let a factory object create an object, but to turn the r...
[caption] Luogu P5339 [TJOI2019] singing, dancing, rap and basketball
Original question gate This question zsy is about \ (O(n^2) \), and NTT\(O(n^2\log n) \). My problem is violence, \ (O(\frac) \), enough to pass Consi...
redhat6.7 yum network source configuration
The yum source provided by RedHat can only be used after the current system has registered RHN. If there is no registration, when using yum, you will ...
Why does Hashtable ConcurrentHashmap not support key or null value
Both ConcurrentHashmap and Hashtable are key value storage structures, but they have one difference: ConcurrentHashmap and Hashtable do not support ke...
Gorang as the server, C (unity) as the client, Socket communication problems
Server datalen + message ----- > packagedata ----- > network transmission ([] byte) ---- > client ----- > unpackedata ----- > datalen +...
Sorting List in Java
scene Bean is defined as follows, with only one age field of type Integer. @NoArgsConstructor @AllArgsConstructor(staticName = "of") @Data p...
POJ 2965 The Pilots Brothers' refrigerator
http://poj.org/problem?id=2965 Method 1: I changed it according to 1753. I enumerated directly from 0 to 16. Some redundant code that does not affect ...
Display the current process memory usage value in Unity3D by calling CPP DLL under PC
After parsing MIDI, CSharp wants to write a memory occupation display. Generally, when writing CPP programs, it likes to check the memory and prevent ...
"ZJOI2014" is brilliant
"ZJOI2014" is brilliant In fact, you don't have to build a crystal cube Because, the direction of luminescent crystal should enumerate ...
Swoole and thinkp5 develop WebSocket online chat communication system
To use Swoole in ThinkPHP, you need to install the think Swoole composer package, provided that the system has installed the Swoole PECL extension* T...
Introduction to the battle of URLOS - making LAP Website Environment
1. Make LAP image1.1. Log in to the host machine using ssh, create the Dockerfiel file and fill in the following contents FROM php:7.2.16-apache-stret...
CentOS 7 Build Source Pack Build LNMP Environment
1. Install epel source yum install -y epel-release 2. Install the required software yum install -y gcc automake autoconf libtool make gcc-c++ glibc li...
1-Develop Shared APP (Build Guide) - Build your own server quickly
The APP installation package download link: http://www.mnif.cn/appapk/IotDevelopmentVersion/20190730/app-debug.apk Or scan for QR code download Access...