Using js to solve the problem of Sudoku

Online Sudoku, this website has an answer https://www.sudoku.name/index-cn.php     Algorithm idea Use two-dimensional array to represent chessboard, 0 for null First calculate the set of every empty possible value The dfs search is carried out in turn. After a value is determined each time, the nine palaces and all vertical and horiz ...

Posted on Sat, 30 May 2020 07:09:26 -0700 by TGWSE_GY

About Laravel ORM caching the Model::find method

When working on a project some time ago, you want to cache the Model::find method without changing the method signature. And want to be plug and play. 1. First, let's see what the framework does when we call the find method? Find the code of Illuminate\Database\Eloquent\Model, search find, there is no such method. It seems to be leaving__ Call ...

Posted on Wed, 27 May 2020 07:12:29 -0700 by stanleybb

zabbix+grafana deploy distributed monitoring system

Preface: Zabbix is an excellent distributed monitoring server, which consists of two parts: 1. "ZABBIX server" is used to collect and display data on the web 2. "ZABBIX agent" is used to collect data and send it to the server   When Zabbix was installed, three virtual machines were used to test whether the monito ...

Posted on Wed, 27 May 2020 01:54:43 -0700 by apocryia

php single file upload and multi file upload

PHP file upload configuration php.ini Files and predefined variables$_ FILES 1: Configuration php.ini file To achieve the upload function smoothly, the first thing to do is to php.ini Open file upload and make reasonable settings for some of the parameters. Find the File Upioads item, and you can see that there are three attributes as follow ...

Posted on Tue, 26 May 2020 23:57:49 -0700 by psunshine

php Session method instance

How to judge the user's operation authority through Session In most of the web development process, according to the actual needs, it is necessary to divide the rights of administrators and ordinary users to operate the web site. The following is a comprehensive explanation through a specific code example. (1) Design a landing page, add a form ...

Posted on Tue, 26 May 2020 02:46:38 -0700 by phpmady

php advanced object-oriented application II

Magic method__ get() instance details Methods that start with two underscores in PHP are called Magic methods. For example__ construct(), __destruct (), __clone(), and__ call(),,__get(), __set(),__sleep(), __wakeup(), __toString(), __autoload() and so on are all Magic methods. If you want PHP to call these magic methods, you must first define t ...

Posted on Sun, 24 May 2020 20:08:53 -0700 by Neptunus Maris

PHP version Google Advertising admob server callback verification SSV

Old article, just moved here. Because the business needs to access Google's incentive advertising, it involves the server-side verification (SSV) of Google callback. Python version is based on the third-party package ecdsa out of the box. PHP version also has an ecdsa library, but it is too complex. Think of the openssl rsa key signature chec ...

Posted on Fri, 22 May 2020 08:28:09 -0700 by leena

Submission of php form form

php forms inserting forms into Web pages Insert the form in the normal WEB page as follows: a relatively complete form will be created here to show all the elements and attributes in < form >. <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>index</title> </head> < ...

Posted on Fri, 22 May 2020 01:05:11 -0700 by roba59

php date and time functions

System time zone settings for PHP date and time functions In PHP, there are two ways to change the time zone: The first: modify php.ini For the settings in the file, click data; date.timezone =Option, remove the preceding quotation marks, and change to:“ date.timezone =Asia / Shanghai "and restart the Apache server Second: In the a ...

Posted on Thu, 21 May 2020 22:26:51 -0700 by rklapwijk

PHP message queuing Kafka uses

Install Kafka service Go directly to kafka website and download the latest wget https://mirror.bit.edu.cn/apache/kafka/2.5.0/kafka_2.13-2.5.0.tgz    Unzip, enter directory tar -zxvf kafka_2.13-2.5.0.tgz cd kafka_2.13-2.5.0    Start Kafka service Starting a single node Zookeeper instance using the script in the installation package ...

Posted on Tue, 19 May 2020 07:36:32 -0700 by dmeade