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This article describes how SOEM(Simple Open Source Master) configures the SM(SyncManager) register of the slave. Based on SOEM-1.3.1. 1. SM register SM configuration register starts from 0x800, and each channel uses 8 bytes, as shown in the following figure: The physical start address and control ...

After MySQL is upgraded to 8.0, how to solve the problem of PHP connection error? As a senior MySQL ticket pal, I've been blowing water for 8.0 recently. We know that several MySQL courses have been upgraded to version 8.0 since last year. My VPS has been trying to upgrade for a long time, but the PHP version is too low. I'm worried about ...

This article introduces four common ways of running php: CGI, FastCGI, Apache 2 handler and CLI. There is a certain reference value, friends in need can refer to it, hope to help you. There are four common running modes of PHP: CGI, FastCGI, Apache 2 handler and CLI. 1,CGI CGI is the common gateway interface, which is a program. Generally speak ...

[TOC] MySQL Create Capable Database Architecture Notes Database Monitoring Content to monitor Monitor the availability of a database: instead of just monitoring the existence of a database process, connect to the database over the network and determine if it is available Monitor database performance: QPS TPS, Number of concurrent threads, inn ...

Article Directory XCTF University Battle "Epidemic" Network Security Sharing Competition easy_trick_gzmtu webtmp hackme fmkq PHP-UAF nweb sqlcheckin XCTF University Battle "Epidemic" Network Security Sharing Competition easy_trick_gzmtu First of all, it's really a good id ...

1. What is RPCRPC is a way of communication between processes, the full name is "remote call procedure".When a client sends a request to the server, it is not sent directly to the target server, but to the RPC Server, which schedules it.RPC provides remote calling methods that are no different from calling local methods. 2. Introduct ...

Compiling and installing PDO MySQL extension of php7 Note the execution path of all the following codes. If your file is not in the path of the sample code, please execute it in the corresponding path of your own file The premise is that php7 is already installed using source code. Otherwise, you need to download the source code of PDO MySQL ...

nested exception Before we learn about SPL exceptions, let's take a look at nested exceptions. As the name implies, nested exceptions are nested inside the Exception. An Exception is thrown, and an Exception is thrown after the catch arrives. In this case, nested exceptions can be obtained by the getPrevious method of the Exception base class; ...

Recently, I plan to transfer my blog to the typecho platform and choose a theme that I personally prefer. Akina for Typecho Theme Template Thank you for the open source sharing of the theme, but there was a "500 Database Query Error" problem at the beginning of the use process.Add the following code at the beginning of the index.php f ...

1. DB facade (original lookup) // query $objectArray=DB::select('select * from student'); foreach ($objectArray as $obj){ echo $obj->id; } // insert $bool=DB::insert('insert into student(name,age) values(?,?)',['tom',18]); // modify $num=DB::update('update student se ...