Detailed explanation of php's high precision calculation

PHPer engaged in the financial industry has frequent capital calculation. If you don't pay attention to it, you may lose hundreds of thousands or even worse... Let's take an example: javascript Why is 0.1 + 0.2 not equal to 0.3? (correct result: 0.3000000000000004) Why is 0.8 * 7 not equal to 5.6? (correct result: 5. ...

Added by tekkenlord on Thu, 16 Apr 2020 13:12:51 +0300

C#.net Implementation of Zhongtong Express Single Query Express Bird API Interface

In the last article, we introduced a logistics service provider. We recommend you to use Express Bird Interface. It mainly describes how to register an account, get a key, and find a registered address. I'll send it: http://kdniao.com/reg Today we're going to talk about how to use the interface provided by courier birds for instant queries. ...

Added by forced4 on Wed, 15 Apr 2020 04:59:12 +0300

Laravel Contracts Conceptual Analysis and Code Samples

Introduction to Contracts Laravel's Contract Contracts are a set of interfaces and a specification for code implementation.The Laravel Framework Core Service provides many Contracts, such as IlluminateContracts\Logging\LoggingLogging, which defines the method required to log. The framework itself has corresponding implementations for Contracts, ...

Added by andychurchill on Sat, 11 Apr 2020 04:52:21 +0300

thinkphp realizes mailbox activation when users register

When some websites register, they will send email to the user's mailbox. Click the link in the email to activate the account. The basic principle is to save the user's information into the database at the time of registration (i.e. Click to send email). In addition, there is an activated field (default is not activated) that clicks the link in ...

Added by guyfromfl on Wed, 08 Apr 2020 07:46:04 +0300

http network request sent by qt

4. Send http request 4.1 copy mynetworkobject.cpp and mynetworkobject.h to your project (ps: these two documents were found on the Internet, and I have modified them) 4.2 add "mynetworkobject.h" to the header file // I added it in mainwindow.h (no special explanation below, take this demo as an example) #inc ...

Added by Strings on Mon, 06 Apr 2020 04:08:50 +0300

[bzoj1070][SCOI2007] vehicle repair [cost flow]

[title link]   http://www.lydsy.com/JudgeOnline/problem.php?id=1070 [Abstract] The way to build a map is still quite magical. We don't consider the waiting cost before each car, but consider the impact of each car on the next car, so we put each car in the front. The cost is the number of cars behind it × it ...

Added by CanMikeF1 on Sun, 05 Apr 2020 06:54:03 +0300

thinkphp5 taglib custom tag tutorial

Learn to write for a while, finally done, by the way share!taglib is the custom tag function of tp framework. If you have used cms, you must have seen something similar:   {dede:arclist typeid='' row='' col='' titlelen='' infolen='' orderby='' keyword=''} ssss... {/dede:arclist}   Or:   {pc:content action="lists" cache="3600" num="20" page= ...

Added by cobaswosa on Sat, 04 Apr 2020 22:21:17 +0300

Executing SQL statements with PDO

There are two methods to execute SQL statements in PDO:    1. exec() is used to process statements that do not return SQL results, such as insert update delete create, etc., but it will return the number of affected rows If you are executing an insert statement, you can use the lastinsertid() method to get t ...

Added by flOid on Sat, 04 Apr 2020 11:29:40 +0300

Develop an app with vue (4, a long-awaited article) H5 live platform login registration (1)

My last article on vue is a little bit too long away from this one. It's finally finished recently. Because I always want to write something with some achievements, rather than just a tutorial. Combined with the recent experience in the project and a little creativity. First of all, what is this! H5 live platform! It's not a title. I've dev ...

Added by xangelo on Fri, 03 Apr 2020 22:27:59 +0300

The whole process of building php7 and nginx running environment with docker

Since we used to use docker image to enter the container and use yum to install nginx or php, we found that the whole image is larger and faster by 2G. Large documents will affect the environmental shift value, and there is no technical content. Today, I found a sub environment installation on the Internet to separate nginx and php into two ima ...

Added by luxe on Fri, 03 Apr 2020 12:00:19 +0300